1. RV Vents and Fans
  2. MaxxAir
  3. Roof Vent
  4. With 12V Fan
  5. Vent
  6. 14W x 14L Inch
MaxxFan Plus Roof Vent w/ 12V Fan and Thermostat - Manual Lift - 10 Speed - White

MaxxFan Plus Roof Vent w/ 12V Fan and Thermostat - Manual Lift - 10 Speed - White

Item # MA00-04000K
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Our Price: $208.15
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Shipping Weight: 12 lbs
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Product Expert Adam Y

Is this right for you? Product Expert Adam Y says:

Yes, if you:

  • Just want to set your thermostat and forget it instead of turning your fan on and off
  • Want more adjustability with your fan speeds to control the amount of airflow inside your RV
  • Like the clean look of a keypad to control your unit over a bulky knob

No, if you:

  • Want a darker, smoke-colored lid over a white one to better match your RV’s roof
  • Prefer to buy American
This manual-lift roof vent has a reversible, 10-speed fan and a thermostat to regulate airflow inside your RV, camper, or trailer. Ceiling fan mode circulates air when vent is closed. Removable bug screen keeps insects out. Lowest Prices for the best rv vents and fans from MaxxAir. MaxxFan Plus Roof Vent w/ 12V Fan and Thermostat - Manual Lift - 10 Speed - White part number MA00-04000K can be ordered online at etrailer.com or call 800-298-1624 for expert service.
  • All Info
  • Reviews (396)
  • Q & A (84)
  • Photos
  • Why etrailer?

MaxxAir RV Vents and Fans - MA00-04000K

  • Roof Vent
  • With 12V Fan
  • Vent
  • 14W x 14L Inch
  • White
  • Manual Lift
  • MaxxAir

This manual-lift roof vent has a reversible, 10-speed fan and a thermostat to regulate airflow inside your RV, camper, or trailer. Ceiling fan mode circulates air when vent is closed. Removable bug screen keeps insects out.


  • Roof vent with fan and thermostat moves air in and out of your RV, camper, or enclosed trailer
    • Vent allows air to circulate while your RV remains locked and secure
  • 12V DC, variable-speed fan has 2 modes of operation
    • In manual mode, 10 speed options let you increase or reduce airflow
    • In auto mode, fan turns on and off based on preset temperature of thermostat
  • Reversible fan can either bring air in or exhaust air out
    • Circulates air like a ceiling fan when the vent is closed
  • Flush-mounted keypad on vent allows you to set the thermostat and the fan speed and direction
  • White-colored dome (or lid) is made of high-density polypropylene
    • Seamless, low-profile appearance when closed
  • Manual lift design has 2 arms to support the dome and keep it open
    • Manual knob lets you operate dome
  • Bug screen keeps insects out and is easy to remove for cleaning or maintenance
  • Fuse-protected, ball bearing motor is sealed to keep out dust, dirt, and moisture
  • Rubber weather seal helps prevent leaks when vent is closed
  • Molded-in mounting flange is constructed of UV-resistant ABS plastic
    • Smooth edges won't cut you during installation
  • Mounting tabs on flange allow for no-drill, tool-free installation of FanMate vent cover (sold separately)
  • White interior trim piece (or garnish), insulated electrical connectors, and hardware are included for installation
    • Roof sealant sold separately
  • 2-Wire design
    • Black wire is power
    • White wire is ground


  • Fits: roofs 2" - 6-1/2" thick
    • Opening size: 14" wide x 14" long
  • Overall dimensions (outside of flange to outside of flange): 18-1/8" long x 16-1/2" wide
    • Garnish dimensions: 16-1/4" long x 16-1/2" wide
  • Vent extends above roof:
    • When closed: 3-3/4"
    • When open: 11-7/8"
  • Overall fan diameter: 12"
  • Fan capacity: 900 CFM
  • Quantity of fan blades: 10
  • Power draw: 5 amps
  • Warranty:
    • 2-Year limited on vent assembly
    • Limited lifetime on dome

Note: Not for use above tubs, showers, or range cooking surfaces.

Reversible, Variable-Speed Fan with Thermostat

MaxxFan Plus Fan Motor

The 12-volt, variable-speed fan has 2 modes of operation: manual and auto. When the fan is in manual mode, you can choose from 10 different speeds to increase or reduce the airflow as needed. Auto mode works in conjunction with the fan's thermostat.

To enter auto mode, press the auto mode button on either the remote control or keypad. Once the fan is in auto mode, the thermostat is activated with a set temperature of 78 degrees F. Pressing the arrow keys on either the remote or keypad changes the set temperature in 1 degree increments. When the thermostat is set, it senses the room temperature and automatically turns the fan on if it is above the set temperature. The fan shuts off when the set temperature has been reached. If the room temperature rises, the fan turns on again. This keeps your RV cool and comfortable and saves you from having to adjust the fan by hand. The auto mode also saves energy by running the fan no more than necessary, especially while you're away or asleep.

This fan is reversible, which means you are able to both exhaust stale air out of your RV and bring fresh air in from the outside. To enter ceiling fan mode, close the vent while the fan is still running. The fan then circulates the air inside your RV like a ceiling fan.

The fan has a fuse-protected, ball bearing motor that is sealed to keep out dust, dirt, and moisture.

Flush-Mounted Keypad

Keypad for MaxxFan Plus

The flush-mounted keypad on the vent enables you to operate the vent and fan, including opening or closing the dome and turning the fan on or off. You can also control the fan speed, the direction of the airflow, and the set temperature for the thermostat.

Manual-Lift Dome with Twin Arms

MaxxFan Plus Dual Arms - Manual

The dome on this roof vent is constructed of durable high-density polyethylene, and it is translucent so that some natural light can shine through. When it's closed, the dome provides a seamless, low-profile appearance that blends into the roof of your RV.

Unlike a dome that has only 1 arm, this manual-lift dome is supported by 2 sturdy arms so that it will not flutter during high winds or while you are driving.

MaxxFan Plus Manual Knob

And a manual hand knob is built into the underside of the vent to allow you to open and close the dome. Pull the knob outward, turn it to where you want it, and push it in to lock the dome into place.

Removable Bug Screen

MaxxFan Plus Bug Screen

This vent has a bug screen that helps keep insects and debris out of your RV. It is secured to the vent with 4 built-in retainer clips. These clips make it easy to remove the screen for cleaning or maintenance. Just rotate the clips, and the screen will pop out.


The MaxxFan Plus vent fits standard 14" x 14" openings in the roof of an RV, camper, or enclosed trailer. A white interior trim piece (or garnish), insulated electrical connectors, and hardware are included for installation. The vent also has a molded-in mounting flange that is lined with a rubber weather seal, which helps prevent leaks. Roof sealant (sold separately) is required for installation.

To install, connect the two wires on the vent to your RV's electrical system. The black wire is for power, and the white wire is for ground. Then insert the MaxxFan Plus into the opening in the roof and mount the flange to the roof. To finish, trim the garnish as needed to fit the thickness of your roof and install it.

MaxxFan Plus With FanMate Cover

For extra rain protection, install a MaxxAir FanMate vent cover (sold separately) using the molded mounting tabs located on the flange. The tabs are designed to align with the integrated brackets on the FanMate, allowing for a no-drill, tool-free installation. These tabs also have rubber inserts that prevent water from seeping in under the flange.

00-04000K Max Air Max Fan Plus RV and Trailer Roof Vent - White Dome

Replaces MA04000K

Customer Reviews

MaxxFan Plus Roof Vent w/ 12V Fan and Thermostat - Manual Lift - 10 Speed - White - MA00-04000K

Average Customer Rating:  4.8 out of 5 stars   (396 Customer Reviews)

This manual-lift roof vent has a reversible, 10-speed fan and a thermostat to regulate airflow inside your RV, camper, or trailer. Ceiling fan mode circulates air when vent is closed. Removable bug screen keeps insects out.

- MA00-04000K

I've had the fan in for a season, and a couple southern road trips. Generally happy. It will run "all night" with no problems on the stock dual batteries in my Ford Transit passenger van. Didn't spring for the remote and maybe would the next time. the controls are bit small, hard to reach, a touch confusing for groggy, middle of the night changes. Fan is quiet and efficient but even on high, directly over the bed, it's not going to bath you with sweat drying air movement. Quality seems good, I installed with an aftermarket, designed for the transit roof profile, ring, it went well. I painted the interior trim with gray "for plastic" rattle can paint to match the Transit ceiling and that is good stuff, it held up well to multiple on offs while getting the install just right". I also brush painted elastomeric white roof coating over the exterior caulk and and mounting screws, zero leaks so far.

- MA00-04000K

GreT product arrived early etrailer is a very good company

- MA00-04000K

Works great quiet easy to install Wish my RV’s had places for more Like the temp setting and reversibility go to Death Valley a lot energy efficient have solar can Even leave on in storage if not worried about weather Need to get rain cover than no worries

One of the best up breads I’ve made quiet efficient reversible and not real difficult for a diy project
Les - 12/03/2020

- MA00-04000K

Works as it should. Just know that the MaxxAir II Vent Cover keeps the lid from closing all the way and making a seal. Allows about 1/2" gap.

- MA00-04000K

Just got it installed, works great! I had to do some modifications to the roof because I didn't pay attention to the 2 inch minimum, overall not a bad install process. etrailer was quick and had excellent service as always.

We typically dont need AC, so this fan has been a perfect option to get air flow in our truck camper. An added benefit is that we can put up and take down the pop-up without having the door open to bugs or having to manually tap in the canvas. An excellent addition to our rig. Install was pretty easy, the hardest part was getting the electrical service from a light fixture.
Roger - 08/02/2020

- MA00-04000K

I had used various AC fans and DC muffin fans to cool my 6 X 12 cargo/camper trailer. What a waste of time and money that was. I had figured that since I had such a small space, I would need less fan to keep it cool. If a 26 foot long 8 feet wide RV needed only one MaxxAir or Fantastic Fan, then a fan with half the power should work with my tiny trailer, right? Wrong! Don't waste your time with cheap fan. Get a real one that will move real air. I absolutely love the thermostat; it works extremely well at keeping the inside at a comfortable temperature. As the day heats up, the fan slowly ramps up- the hotter it get, the faster it spins. If it is only warm, the fan barely turns. Other fans with a thermostat will jam on at high speed, then shut completely off, then jam on again in a jarring, cyclic effort to maintain an even temperature. As the night cools down, my MaxxAir slowly ramps down to an idle so that I can't hear it which is nice when wanting quiet time for sleeping. Some time during the night it shuts off completely. When I sleep in, I'm not awoken by a loud fan kicking in. The thermostat mode is utilized almost exclusively. Whoever included this type of thermostat is a genius. Having the 10 speeds also helps tremendously at keeping a stable temperature and it does so with a quietness that is far and away better than any AC fan. Muffin fans are quiet, too, but they are anemic and won't work against any kind of breeze. The buttons and switches are easy and intuitive. Keep in mind the manual button and the thermostat button are completely separate from each other. Using the manual button will have no effect on the thermostat button and visa versa. Very efficient with electricity while having a ton of power. This is one of the best purchases I have ever made. Describing how well this fan works compared to other fans is hard to put into words. Very high quality and highly recommended. And a huge thumbs-up for etrailer's customer service. The only negative was not having a template. The installation took a lot longer sans template. This wasn't to replace an existing fan. This was a virgin install on a vertical wall with no help from anyone but my dog.

This fan still remains one of the best purchases Ive made for my trailer. I cant talk highly enough about the quality, ease of use, and effectiveness of this fan.
Willie - 08/30/2018

- MA00-04000K

Etrailer shipped,very quickly. While researching which vent/fan I wanted to replace my old unit I used the advice function on the web site. The advice was quick and very useful. I looked at YouTube for installation instructions and was very happy to see the vent/used n the video was this unit. The video also gave me the confidence to do the instillation. The vent/fan was very easy to instal and works well. It is very quiet compared to the fan that came with my camper. I'm very happy with this vent/fan and etrailer.

Ive only used the fan three times since I installed it. Im still very happy with the fan.
TimNH - 09/08/2017

- MA00-04000K

Great fans. We boondock a lot so don't use the AC much, so two of these give it lots of airflow and keeps us pretty cool in our 21' TT. They have lots of air flow to clear out the heat in just a few minutes. They are totally silent on low and not very loud on high (Some say quieter than the Superfan). When we cook we reverse the flow to blow in and pressurize the odors and smoke out the hood vent and kitchen window. The only recommendation I have is to consider the one with the remote control. My wife is 5'0" and cannot reach the controls to open the vent nor turn it on/off.

Still great.
Carl - 07/22/2019

- MA00-04000K

Awesome! No RV should be without at least 1 of these high flow fans. I have installed 2 different Maxxair models in my Reflection and love them both. I put the remote controlled model in the kitchen/living area where it is too high to reach the controls. Very well made fans.

These fans are as awesome now as ever!
James - 06/27/2019

- MA00-04000K

The best part of the Maxxair MaxxFan Plus Roof Vent w/ 12V Fan and Thermostat Manual Lift 10 Speed was installing it myself. I had climbed to my van to it's perfect white metal roof. Run an extension cord. Plugged in the [hardware brand] jigsaw. Bzzzzz. Four inches of sliced virgin metal. Four inches of hole across the roof. An existential moment. No going back. No trial run. Only forward. Forward like the Merry Prankster's bus. Only later did I realize the point of no return had long since past. It past when I drilled the pilot holes before making the crooked ragged jigsaw cuts. Installation was empowering. It took me out of my comfort zone. Cutting a ragged hole in the roof changed the way I think about cars. And it all worked out. Installation was as straight forward as people say it is. The hardest part was my mental resistance to cutting the roof. The vent doesn't leak. It moves air. It's quiet and does not draw much power. I love that it is reversible. At night, I set it to exhaust so light seeking moths don't die in the spinning blades. They are blown away instead of sucked in. For the electrical. I fused both positive and negative off the battery. I ran the power wires through flex automotive conduit. I picked up the fusing, wire and flex conduit from my local Walmart after figuring out what I needed. The hard part of that was determining wire gauge based on the total length of the feeds. The length was longer than I would have guessed when I measured it. And it all worked the first time I pushed the button. Great product. Great experience.

- MA00-04000K

Fast and easy transaction.

- MA00-04000K

Item was very easy install aside from removing the old unit and cleaning the site prior to install. New unit did not require any cutting of plastic trim - fit perfectly as-is right out of the box. Used dicor lap sealant and was completed in quick order. We installed this on a 2013 Keystone Cougar bathroom to replace the tiny oem fan. Later on I did purchase the MaxxAir vent cover that is specific to this product (Fanmate) This took 5 min to install with 4 clips.

- MA00-04000K

Great service

- MA00-04000K

This is my second purchase of this fan. The first one went away when I sold my van. My new van will be receiving this one. I was so satisfied with my previous MaxxFan that purchasing a second one was a no-brainer. Quiet and reliable with a number of useful features. Note the double brackets supporting the top, unlike other competing vents. This is my third purchase from etrailer. Their prices are great and shipping is fast.

- MA00-04000K

I needed a power vent for a utility trailer that I was converting to a small camper. The vent was easy to install and make weather tight. It has operated perfectly for a year now. I thought it was a good buy.

- MA00-04000K

Fast delivery! High quality pieces!

- MA00-04000K

Great fan, ability to draw air into the RV is a real plus.

- MA00-04000K

The MaxxFan roof vent works great and got it fast. (Fast shipping)

- MA00-04000K

This fan is awesome, it moves a lot of air, installation was simple, replaced a regular gravity vent in my RV, obviously a Hugh improvement. Shipping was lightening fast from etrailer.com, and was reasonably priced, I would highly recommend them!

- MA00-04000K

Yes, it works well. We like the feature that you can use it with the lid down. Gives us the white noise without the outside air or cold.

- MA00-04000K

Just what I wanted. Put it in the roof vent in the bedroom of my 5th wheel and really helps cool the trailer.

Excellent addition to help keep the trailer cool.
Bob - 06/03/2019

- MA00-04000K

etrailer is GREAT! Haven't used the product yet but ordering & shipping was fast & efficient! I would much rather buy from these guys vs. the big "A"

- MA00-04000K

We replaced a Fantastic Fan with this Maxxair 4000. It was fairly easy for my husband to install. We like the 10 speed feature.

- MA00-04000K

I have this very fan in my RV and it is beyond amazing! I am doing a rebuild for a friend and we are putting two in. one at the front and one at the back. that way one can push and the other pull and circulate the air even better!

- MA00-04000K

It’s a simple design, but works great. It’s reversible and has lots of speeds. The screen is easily removable for cleaning but locks in place. The lid is manual and the crank takes some getting used to but also locks in place and has been very reliable so far. Overall, for the price, this is a great fan.

Show More Reviews

Ask the Experts about this MaxxAir RV Vents and Fans

  • Troubleshooting MaxxFan Not Opening on 2017 Grand Design Reflection
    It looks like you have the MaxxAir MaxxFan Plus Roof Vent w/ 12V Fan - Powered Lift - 4 Speed - White # MA00-04751KSX. The unit sounds like it is malfunctioning and this could be due to the rain sensor # MA34FR. It sounds to me like the sensor is seeing moisture whether there or not and keeping the power lid from opening. I recommend unplugging the rain sensor and seeing if all the other functions work. If so, then simply replace that sensor. If the other features still do not work,...
    view full answer...
    Image 1 for
  • Replacement Circuit Board for MaxxAir Model 4751KSV05 Powered Vent Fan
    I reached out to my contact at MaxxAir and she said that the correct printed circuit board for your MaxxAir model 4751KSV05 powered vent fan is the part # MA10A04751KS.
    view full answer...
  • Smoked Lid for MaxxFan Plus Roof Vent # MA00-04000K
    We do have a smoked lid that fits the MaxxFan part # MA00-04000K that you have as the part number # MA10A40009K which will bolt right up easily and allow more light through.
    view full answer...
  • Troubleshooting MaxxFan MA00-07500K Deluxe Foof Vent Fan
    I spoke with the folks at Airexcel, who ran through a few different troubleshooting scenarios with me. As a first step, disconnect power to the fan for a few minutes, then reconnect power to reset the circuit board. If that fails to solve the problem, there are other things you can check. Can you operate the lid manually with the knob. If you cannot, it's an indication that either the mechanism is jammed or the lift motor is shorted out and needs replacing. A replacement lift motor is...
    view full answer...
  • Troubleshooting MaxxFan Plus Roof Vent
    According to the manufacturer's instructions three beeps and a green light on the MaxxFan Plus Roof Vent # MA00-04000K indicates you have entered Auto Mode so that all seems normal. However, if the light is on but the fan has stopped working that is most likely a sign that the circuit board has failed and needs to be replaced. For MaxxAir model 4000K you'd want to use Replacement Printed Circuit Board for MaxxAir Manual Lift RV Roof Vents # MA10A21276K.
    view full answer...
  • Solution for MaxxFan Roof Lid that Stopped Opening with Switch
    Sounds like the lift motor needs to be replaced as it's no longer able to raise the vent lid. For that you'd want the part # MA10-20270. Since you are able to lift the lid manually it wouldn't be the operator. If this were the problem it would either make noise like you mentioned or wouldn't allow you to manually lift it.
    view full answer...
  • Troubleshooting Remote Not Working with MaxxFan Plus Roof Vent # MA00-04000K
    If your MaxxFan Plus Roof Vent # MA00-04000K isn't responding at all to the remote then most likely it just needs to be replaced with part # MA00A01150K or the batteries are just in need of a change. I do also recommend verifying that you're able to adjust the speed settings and other controls by using the buttons on the vent itself to rule out the vent from being the issue. If you can't adjust anything using the vent buttons either then the remote is likely fine but a replacement...
    view full answer...
  • Troubleshooting Maxxair Deluxe Fan That Starts and then Quits, Closes and Beeps Constantly
    It sounds like a circuit board issue. I recommend the Replacement Printed Circuit Board for MaxxAir Manual Lift RV Roof Vents # MA10A21275K if you have a 4500K, 7000K, or 7500K model. If your model is a 4000K, 5100K, or 6200K then Replacement Printed Circuit Board for MaxxAir Manual Lift RV Roof Vents # MA10A21276K is what you need.
    view full answer...
  • Troubleshooting MaxxFan 04000K That Does Not Adjust Function with Remote or Buttons on Fan
    Your MaxxFan Plus Roof Vent w/ 12V Fan and Thermostat - Manual Lift - 10 Speed - White # MA00-04000K has a bad circuit board. If you recently installed it, you will want to look at the manufacturer warranty. If it is an older unit, then you will want the Replacement Printed Circuit Board for MaxxAir Manual Lift RV Roof Vents # MA10A21276K which will restore all of the functions you are currently missing.
    view full answer...
  • Can MaxxFan Plus Roof Vent W/ 12V Fan Replace Standard Roof Vent On 1998 Casita Spirit Deluxe
    The MaxxFan Plus Roof Vent w/ 12V Fan and Thermostat - Manual Lift - 10 Speed - White # MA00-04000K you were looking at will require the roof of your 1998 Casita Spirit Deluxe to be 2"-6-1/2" thick, and will require a 14" x 14" opening. If you find that your roof is not quite thick enough you can use lumber to frame out the opening to add thickness. There is no reason the # MA00-04000K will not work for your camper, but you will need to add a 12v power wire and ground wire from your...
    view full answer...
  • MaxxFan Plus Roof Vent Cycles a Few Times After Vent is Closed
    If you have the MaxxFan Plus Roof Vent # MA00-04000K installed then it would make sense that the fan would continue to operate with the vent closed as this acts as a ceiling fan when the vent is closed. Should you have a different MaxxFan just let me know what the model is and I can look into it further.
    view full answer...
  • Troubleshooting MaxxFan That Beeps and Has Flashing Green Light
    I'll start off by saying that typically the flashing green lights on your MaxxFan # MA00-04000K means that there is some sort of voltage issue and even though when you tested you're getting what seems to be proper voltage, I would guess there is a short on the circuit that is causing the problem. I would recommend checking to make sure that the ground is properly attached to an area of the coach that is free from dirt, debris and corrosion. This would also be a good time to make sure...
    view full answer...
  • Wall Control Remote for 4000K Maxxfan Plus Roof Vents
    I reached out to Maxxair they informed me that the only switch or remote compatable with the MaxxFan Plus Roof Vent part # MA00-04000K is the Replacement Handheld Remote for Maxxair Roof Vent Intake/Exhaust Fans part # MA00A01150K . This will work with your current setup and has a nice hanger that will allow you to attach it to a wall in a convenient location of your choosing so it is readily available. He stated the line in the operation manual may have been a carry over from another...
    view full answer...
  • Troubleshooting MaxxAir Vent Lid
    The statement of MaxxFan Plus Roof Vent, # MA00-04000K, lid not opening while fan running caused me to think your setting is in ceiling fan mode. However, if you cannot open the lid, even manually, then you have an issue with the operator mechanism. The Replacement Operator Mechanism for MaxxAir MaxxFan Plus or MaxxFan Deluxe Roof Vents, is # MA10-20281K-1AF.
    view full answer...
  • MaxFann model 4000K Will not Shut Off
    It sounds like the Circuit board has failed on your MaxxFan Plus Roof Vent part # MA00-04000K the correct replacement for that is the Replacement Printed Circuit Board for MaxxAir Manual Lift RV Roof Vents part # MA10A21276K. This is a direct replacement and will plug directly into the plugs on your current vent. You will need to reconnect your power and ground using a couple of butt connectors like Butt Connector - PVC - for 16-14g Wire part # DW05714.
    view full answer...
  • Replacement Operator for MaxxFan # MA00-04000K
    From checking with Maxxair in the past we've determined that the correct replacement operator for the vent A4951KS is the part # MA10-20281K-1AF which would be what you'd need.
    view full answer...
  • Maxx Air Fan Lid Unable to Fully Open
    It sounds like the lift arms aren't able to keep the lid up to the fan's fully-opened height. There are a few things that may cause this. You may have already tried this, but push the manual knob in when the you've reached the fully-opened position to engage the locking mechanism. If that doesn't solve the problem, there are some troubleshooting steps to take. First, check to make sure the bolts of the lift arms are fully tightened. If there are loose components, it may not be able...
    view full answer...
  • MaxxFan MA00-4500K Vent Lid Will Not Open
    As a first step, disconnect power to the fan for a few minutes, then reconnect power to reset the circuit board # MA10A21275K. If the fan fails again it could be the circuit board. Your rain sensor could incorrectly think rain is present on the rain sensor # MA34FR. Unplug rain sensor, leave unplugged and try again. If it begins working, it could be the sensor. If you cannot open the lid manually it may be a jammed or stripped operator # MA10-20281K-1AF, or the lift motor is shorted...
    view full answer...
  • Replacement Round Bug Screen for MaxxAir Roof Vent
    We do have the replacement round screen for your MaxxAir roof vent, like the MaxxFan # MA00-04000K. This is listed as part # MA05-30925 on our site.
    view full answer...
    Image 1 for
  • Recommended Vent Rain Cover for MaxxAir MaxxFan # MA00-04000K With Integrated Mounting Tabs
    For your MaxxAir MaxxFan Trailer Roof Vent w/ 12V Fan # MA00-04000K the recommended vent cover is the MaxxAir FanMate Rain Cover - White # MA00-955001. This is designed by the manufacturer to work with the integrated mounting tabs of the vent. I've attached a couple videos to assist. This will not only give you rain protection with full access to the fan and bug screen but also will restrict your airflow by less than 5 percent so you will be able to enjoy the vent.
    view full answer...
    Image 1 for
  • Troubleshooting MaxxFan that Opens and Closes on Its Own
    If you have the MaxxFan part # MA00-04000K you need the replacement circuit board part # MA10A21276K as yours is damaged which is what's causing the strange behavior of yours.
    view full answer...
  • Installation Kit for MaxxAir MaxxFan Trailer Roof Vent w/ 12V Fan MA00-04000K
    To install MaxxAir MaxxFan Trailer Roof Vent w/ 12V Fan - Manual Lift - 14-1/4" x 14-1/4" - White Item # MA00-04000K you can use Installation Kit for Trailer Roof Vents # 344270KITW. It includes silicone sealant, Butyl tape, and screws for installation. I have linked a video review for you.
    view full answer...
  • Troubleshooting MaxxFan Plus Roof Vent 4951KS Stuck Open With Fan On.
    The issue your MaxxFan Plus Roof Vent 4951KS is having is a tell tale sign of a bad circuit board. What I recommend is first completely unplugging the circuit board, as it has a built in lock that gets engaged under certain conditions and makes it where the fan and lid will get stuck either on or off. Unplugging it for a few minutes and the reinstalling it resets the lock. If this does not fix the issue you will need to replace the circuit board using the # MA10A04751KS. I included...
    view full answer...
  • Solution for MaxxAir RV Deluxe Roof Vent that Won't Raise and Lower Manually or Electronically
    What you need is a new operator for your MaxxAir Deluxe roof vent as this is the mechanism that raises and lowers the lid. For that you'll need the part # MA10-20281K-1AF.
    view full answer...
  • Troubleshooting A MaxxFan Plus Roof Vent That Won't Open Electronically
    Since your MaxxFan Plus Roof Vent w/ 12V Fan and Thermostat - Manual Lift - 10 Speed - White # MA00-04000K is trying to close when already closed and not responding correctly when pressing buttons the control board must be malfunctioning. I recommend replacing it with the Replacement Printed Circuit Board for MaxxAir MaxxFan Plus Roof Vents # MA10A04751KS.
    view full answer...
  • Can Two Maxx Fan 12V Vents Be Connected to the Same Circuit
    You can connect two fan-powered trailer vents to the same wiring in your trailer as long as that wiring can handle the power drawn by both vent motors. The MaxxFan Trailer Roof Vent # MA00-04000K needs a circuit that can deliver 5-amps of current. If you connect this to the existing wiring and find that you blow a fuse or trip a breaker on that circuit you can run new wiring # 10-2-1 from the additional vent to the power panel or battery in the trailer.
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  • Replacement Switch for MaxxAir Roof Vent
    I recommend using a Circuit Tester like # PTW2993 to determine if the switch is bad or if the fan motor is bad. If you need to replace the wall switches, I recommend the Wall Remote Switch # VC0533-02-A. If you test the motor and the motor is bad, unfortunately the manufacturer doesn't have the replacement parts available so you will need to replace the entire unit with something like the MaxxAir MaxxFan Trailer Roof Vent w/ 12V Fan # MA00-04000K or further upgrade to the integrated...
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  • Can the MaxxFan Trailer Roof Vent # MA00-04000K be Left Open Without Rain Getting Inside
    The only way to operate the MaxxAir MaxxFan Trailer Roof Vent # MA00-04000K without rain getting inside is to also install the MaxxAir II Rain Cover # MA76JR. If you are wanting a single-piece unit that includes a rain cover and utilizes a thermostat and a manual lift then the MaxxAir MaxxFan Trailer Roof Vent # MA00-06200K for Smoke or # MA00-05100K for White is exactly what you are looking for. All of these roof vents come with mounting hardware but you will also need some sealant...
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  • Troubleshooting MaxxAir Fan Issue with New Motor
    It sounds like your MaxxAir MaxxFan Trailer Roof Vent has a powered lift like # MA00-04500K but has a connection issue. It is getting power for the lid to open and close but not for the fan function. I recommend testing your wiring using a circuit tester like # PTW2993 to make sure you are getting power to your fan switch and if so if power is getting to your new motor. If you test the motor with a battery and it works, then you know you have switches or wiring that is in need of...
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  • Troubleshooting MaxxAir Vent Powered Lid that Won't Open
    I've attached the owners manual for your 4900K model which is similar to the # MA00-04500K model. It sounds like your operator mechanism is bad according to my tech contact at MaxxAir. For your 4900K model you will want the Replacement Operator Mechanism for MaxxAir MaxxFan Plus or MaxxFan Deluxe Roof Vents # MA10-20281K-1AF. If you can't even manually lift the lid, this mechanism is definitely the issue.
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