Product Experts Available Now!
Call 1-800-940-8924
Replacement Printed Circuit Board for MaxxAir Powered Lift RV Roof Vents w/ Exhaust Only Fan
(125 reviews)
Price: $94.53
In Stock
MAXXAIR
Replacement Printed Circuit Board for MaxxAir Powered Lift RV Roof Vents w/ Exhaust Only Fan
Part Number: MA39FR
In Stock
$94.53
Retail:$112.55
You Save: 16%
Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.
Error submitting comment. Please try again momentarily.
- All Info
- Reviews (125)
- Q & A (0)
- Videos (1)
- Photos
MAXXAIR Accessories and Parts - MA39FR
- RV Vents and Fans
- Roof Vent
- Circuit Board
- MAXXAIR
Replaces the printed circuit board for your MaxxFan RV roof vent with powered lift and exhaust only fan (MA00-04751KSX).
Features:
- Replaces the printed circuit board for your MaxxFan RV roof vent with powered lift and exhaust only fan (MA00-04751KSX)
Fits:
- Model number MA00-04751KSX, MaxxFan Plus 4-speed roof vent
10C21275KE Replacement Printed Circuit Board for MaxxAir Powered Lift RV Roof Vents - Exhaust only
Replaces 10A21275KE and 10B21275KE
Video of Replacement Printed Circuit Board for MaxxAir Powered Lift RV Roof Vents w/ Exhaust Only Fan
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Video Transcript for Review of Maxxair RV Vents and Fans - MA39FR
Michael: Hi there. I'm Michael with etrailer.com. Today we're going to take a quick look at the replacement printed circuit boards for your Maxxair powered lift RV roof vents. As you can see, we've got two different boards here. These are the part numbers that you see on the screen there. Essentially these are exactly the same thing with one small difference between them.
If you look at the circuit board, you can see they have almost all of the same components except this large black box here. This is actually going to . allows this board to work for your Maxxair vents that are both exhaust and intake.This other one that does not have that box is only going to work with your Maxxair fans that are exhaust only. If your unit is able to bring air in as well as exhaust it out, you're going to need this one over here. If your unit is only capable of exhausting the air from inside your RV, this is the unit that you will need here.Keep those part numbers up there for you to make sure that you are getting the right one.
It's a pretty slight difference between them, but obviously it's going to have a big impact on their usability. We want to make sure that you're getting the product that you need. Just wanted to clear that up for you. Both of them are going to work with your Maxxair power. It's just that functionality difference that you need to look out for.
We're going to make sure that you knew the difference and are going to get the right chip that is going to work for you.That is going to complete our look at the Maxxair replacement printed circuit board. Again, I'm Michael with etrailer.com. Thanks for watching.
Customer Satisfaction Score:
87% were satisfied with this product
13% of customers were not satisfied
- etrailer mistake
- Wrong item was ordered
- Alternate product found
Ratings & Reviews
4.7
125 reviews
by:
Suzanne
07/27/2025
I was a bit nervous because my old circuit board had fewer plug ins. There were no instructions so I took the old fan housing an I Installed the new board wire by wire as removed the old board. Works perfectly!
by:
William G
02/11/2026
only used the circuit board. Worked about a week then died so only the fan works and I have to raise the vent by hand just like it worked before the Circuit board wasreplaced.
by:
John
09/13/2025
I was worried that I couldn’t find an OEM compatible replacement controller board for my RV fan. But lo and behold, etrailer had exactly what I needed. Easy install and is still working very well.
On a side note, the original one had water damage from all the moisture in the air. So this time (on the new circuit board) I conformal coated the entire circuit board to help extend the life of it.
Thank you MaxxAir for a great product!
On a side note, the original one had water damage from all the moisture in the air. So this time (on the new circuit board) I conformal coated the entire circuit board to help extend the life of it.
Thank you MaxxAir for a great product!
by:
Gary
08/21/2026
Works as well as the original.
by:
Christine
08/23/2026
Old board was faulty. Replaced with new, works great!
by:
Mark
12/07/2025
Exact fit. Previous order for another Maxxair was incorrect model or flawed. This one is perfect! Anyone know how to make the Remote work from farther distance?
by:
Timothy
08/16/2026
Worked great! Very easy to install, plug & play.
by:
Andy
06/09/2026
It didn't fix my problem but it did help me troubleshoot.It appears to be the push buttons
by:
Deborah
11/11/2025
Easy to locate replacement part. Arrived earlier than expected, installed and works perfectly!
by:
Lon
03/22/2026
Worked perfectly. Thanks
by:
Gregory
10/10/2024
Delivery was quick, but that was the only positive. My problem is that the lid will not open or close via remote. My remote worked to run the fan through all 10 speeds, & auto mode worked, except the lid never opens. The new PCB from e-trailer worked to open and close the lid by remote only once, and afterward it behaved exactly as my current PCB. I contacted e-trailer about the problem, but got nothing but grief. I was told that I ordered the wrong PCB, and I would have to pay the return shipping. I disagreed calmly and explained why they were wrong, but the person at e-trailer insisted. I eventually gave up in frustration, sent the bad PCB back, and got a partial refund. I contacted Airxcell twice and on the second try they responded that e-trailer had sent me the correct PCB (10C21275KEZ, 2023.07) to replace my current PCB (10A21275KEZ, 2019.06). I contacted a local dealer on 13 July about purchasing a new PCB, but they left me hanging after I asked their price. I still have not fixed the problem
Gwendolyn Y.
10/17/2024
Hey Gregory. This sounds like a rough go. I have been doing some research shows me that you got the correct circuit board, especially since it worked once. This leads me to feel like something else is going on. I would check all your connections to make sure nothing may have came loose. I would also test the buttons on the fan to make sure they all work. It's a little hard without knowing the model of fan that you have. Can you send me some pictures of your vent fan?
by:
Tracy
05/28/2022
The MaxVent in our RV got a mind of its own and was not working properly, it would come on or shut off by itself, then quit working together altogether. Repair shops said they could not get a response back from the manufacturer and that everything was on back order. We found etrailer had the circuit board and the video provided to ensure we ordered the right part was very helpful. With the help of an online video, we installed circuit board in under an hour and it worked liked a charm. Easily saved us $200+ in parts and labor. We will shop etrailer.com for our future repair needs.
Tracy G.
10/2/2022
It is working great, no problems.
by:
Fred
10/22/2023
Exactly what was needed to replace malfunctioning circuit board in fan (fan would come on, open vent, turn off and shutdown in a quick sequence, never remaining on for more than 5 seconds). Fast shipping and excellent service.
Fred
10/23/2024
Still going strong!
by:
Vickie
07/21/2024
Perry Knitig was great in helping me troubleshoot. With the new part replaced, it's running great!
Vickie
7/22/2025
Still running great
Lazer S.
7/22/2025
@Vickie Glad to hear you are still a "fan" of it, Vickie! I like bad puns. : P
Any more trips planned? Summer is gonna start winding down fairly soon.
by:
Bruce
02/06/2021
Great customer service. The replacement board fixed the issue with the fan. Will definitely use etrailer again for my parts .
Bruce
2/7/2022
The fan is still chugging along with the replacement board. No issues at all. Thanks again trailer.
by:
Brian
07/29/2025
Part description made it easy to find the replacement since there are so many different fans
by:
William
12/19/2020
Perfect replacement. Works like new. My old control board ran the fan continuously and would not shut off. Installed the board and works as designed.
William
12/20/2021
Well after a year it’s still working perfectly. Great item.
by:
Chris
05/30/2024
Delivery was within a few days of order. The installation was pretty straight forward so if you think you will have a problem, fear not.There are a couple of videos on YouTube to give you a primer so check them out prior. If you want to just dive in, it is simply a matter of removing the screws and trim from inside, remove the old circuit board and related wiring and then install the new one in reverse order. All work was done from inside the RV. It took about an hour or slightly less.
FYI in my case the fan's auto opening lid was not working when the fan was turned on. I first checked the motor to the lid and it was still functioning so the circuit board was my next try. That did the trick.
All is good for now so with fingers crossed I hope it continues to operate as designed.
My application, 2020 Dynamax Force HD. It (the fan) first started acting up by requiring a reset from time to time. In that case I simply pulled the fuse to the fan to force a reset/reboot. that worked for a while.
FYI in my case the fan's auto opening lid was not working when the fan was turned on. I first checked the motor to the lid and it was still functioning so the circuit board was my next try. That did the trick.
All is good for now so with fingers crossed I hope it continues to operate as designed.
My application, 2020 Dynamax Force HD. It (the fan) first started acting up by requiring a reset from time to time. In that case I simply pulled the fuse to the fan to force a reset/reboot. that worked for a while.
by:
Douglas
02/06/2025
Unlike panther rv, you sent me the proper
Maxx air circuit board,and now fan works perfectly again. Thanks for having proper parts in stock and fast service
Maxx air circuit board,and now fan works perfectly again. Thanks for having proper parts in stock and fast service
by:
Mark
07/06/2023
First of all, we don't know if it is even going to work but by golly it better! The fact y'all mailed it to us in a flat envelope is utter shocking! A delicate $XXX part and y'all ship it in a envelope, seriously??!! A box would have protected it!! I want a call back on this. Y'all should know better! There isn't even enough bubble wrap around it to cover an apple! Wow! We are in shock!!
Jenny N.
7/11/2023
We do want for you to receive the circuit board undamaged. I will have our Customer Service teach reach out to you. If there is any damage to the board, we can replace it.
by:
Murray
06/22/2023
I ordered the circuit board because I didn’t want to replace the whole fan it was hard to find this board in Canada ordering was easy and etrailer personnel explained exactly what part I needed. Everything fitted and worked like it was supposed to. The only thing I wouldn’t give 5 stars would be is the postal service but that has nothing to do with etrailer. I would highly recommend them as I will definitely be using them again
by:
Douglas
08/21/2023
The circuit board was packed in bubble wrap and an envelope. It arrived with several components bent flat. I was able to straighten them up without and connectors breaking. It actually worked. They REALY need to use a small box!
by:
Grorge
09/23/2022
Although it took a Lil longer than normal...because of shipping problems to etrailer after shipping it to me it was here next day
Grorge
9/24/2023
Still working like it shud after a year...
by:
Camil
09/04/2025
RECU ENDOMMAGÉ
by:
Butch
02/15/2023
The part worked as it should.
However, this circuit board was packed as a loose item in a tire box with a wet bolt kit and six rubber pads. When I unwrapped it, many of the components were smashed flat and had to be straightened out. Frankly, I was shocked that it worked at all.
Whoever 'packed' this item does not have a clue as to how to pack a sensitive electronic item. It was like throwing an egg in box of stones and hoping that it didn't break!
However, this circuit board was packed as a loose item in a tire box with a wet bolt kit and six rubber pads. When I unwrapped it, many of the components were smashed flat and had to be straightened out. Frankly, I was shocked that it worked at all.
Whoever 'packed' this item does not have a clue as to how to pack a sensitive electronic item. It was like throwing an egg in box of stones and hoping that it didn't break!
25
125
true
Show More Reviews
See what our Experts say about this MAXXAIR Accessories and Parts
- Replacement Circuit Board And Rain Sensor For MaxxFan Model 00-04501KHello Randy, thanks for reaching out. I agree that replacing the circuit board and rain sensor will resolve the issue. We do have the circuit board you are looking for available as part # MA39FR. The rain sensor is part # MA34FR. A lot of times when we hear of the vents beeping and closing when they aren't supposed to it is a circuit board/rain sensor issue so replacing those parts should do it.
view full answer... - Looking For Circuit Board For MaxxAir vent Fan In A 2021 Entegra CornerstoneHello Dale. The circuit board in your picture looks an awful lot like the Replacement Printed Circuit Board for MaxxAir Powered Lift RV Roof Vents w/ Exhaust Only Fan # MA39FR. There are several other similar looking circuit boards though, and generally, we need to get the model number from your vent in order to confirm fitment. There is no way to look up your RV to know what model of fan it was built with, so please inspect the vent to see if you can find a sticker with a part number or...
view full answer... - Replacement Circuit Board for MaxxAir Deluxe Fan 8501KThe Replacement Printed Circuit Board for MaxxAir Powered Lift RV Roof Vents w/ Reversible Fan # MA10A21275K is the correct replacement for your 8501k model and would take care of your problem.
view full answer... - Troubleshooting A MaxxAir MaxxFan That Keeps Turning OffYour MaxxFan Plus Roof Vent w/ 12V Fan and Thermostat - Manual Lift - 10 Speed - White # MA00-04000K could be cutting off after 10 seconds for the following reasons: 1. Insufficient or fluctuating power. Your fan could be receiving less than 12v of power. Check the power wire at the unit using a multimeter like # PT89ZR. If you aren't receiving 12v then you could have a voltage drop off due to the length of the wire running from the battery to the fan and would just need to increase the...
view full answer... - Troubleshooting Lid Won't Open After New Circuit Board InstallationHi Michael, since the issue started after replacing the circuit board, I'd first verify that the new board is the correct one for your 4751KS and that all connectors were installed in the proper locations. Since the lid moves freely by hand and the lift motor runs when powered directly, I'd be hesitant to replace the lift motor until the board part number and wiring have been confirmed.
view full answer... - Replacement Circuit Board for MaxxFan 4700K That Won't Shut Off or Close the LidHey there Walter, Based on the 4700K-U1.6 number on your circuit board, it looks like you have a MaxxFan 4700K. The correct replacement would be the Replacement Circuit Board # MA10A21275K rather than # MA39FR. The fan running continuously and the lid not closing electronically are both signs of a potentially faulty circuit board. However, I'd recommend checking for damaged wiring, loose connections, or moisture/corrosion that could be causing a short before ordering a replacement. What...
view full answer... - Troubleshooting A MaxxAir MaxxFan That Opens But Doesn't CloseIf you already replaced the operator # MA10-20281K-1AF for your MaxxAir MaxxFan and it's working correctly to open but not close then the next part to replace would be the circuit board. Circuit boards are model specific so you will want to ensure you have the correct replacement. The Replacement Printed Circuit Board for MaxxAir Powered Lift RV Roof Vents w/ Reversible Fan # MA10A21275K is compatible with the following models: MaxxFan Plus: 00-04500K, 00-04700K, 00-04800K, and 00-04900K...
view full answer... - Troubleshooting MaxxFan 4700 Series, 4700KYou reported that you cannot use the remote on your MaxxFan 4700K to put the vent cover up and down. Let's troubleshoot. Put some new batteries in your remote. Ensure that the display comes on. Verify if your vent cover now works. Verify if other remote functions work. If it is not your remote we can consider the following service parts. First let's perform a reset. Disconnect the 12volt power source from the fan circuit board for two minutes then reconnect and test again. Many times...
view full answer...
- Correct Replacement for a MaxxFan Motherboard 10A21275KZHey Amy. To replace your Maxxfan motherboard 10A21275KZ you'll want the Replacement Printed Circuit Board item # MA10A21275K. The only exception would be if your fan is the MaxxFan Plus 4-Speed Roof Vent item # MA00-04751KSX in which case you'll need item # MA39FR. Do you know what model your MaxxFan is?
view full answer... - Replacement Circuit Board For A MaxxAir MaxxFan In A 2021 Grand Design Solitude 3540 5th WheelSince multiple MaxxAir Fans have the same features that you listed it's honestly best to first determine the exact model number you have before purchasing anything and end up not having it be compatible. I've listed below all the available circuit boards for the each model, if you have a tag on the vent listing the model number then we can identify the correct replacement. If not, you'll need to pull the circuit board and find the sticker on it that lists the model number. Once I have either...
view full answer...
- Replacement Fan Circuit Board For A MaxxAir Fan With A 10C21275KEZ Circuit BoardThe 10C21275KEZ didn't come back to anything for me which means it's most likely already been replaced with a new version but I can't confirm which with just the part number. We typically just replace the circuit boards based on the model of the unit. I've listed the various models and their replacements below: The Replacement Printed Circuit Board for MaxxAir Powered Lift RV Roof Vents w/ Reversible Fan # MA10A21275K is compatible with the following models: MaxxFan Plus: 00-04500K, 00-04700K,...
view full answer... - Replacement 10-21275KE Circuit Board for MaxxAir Vent Fan Yes, we do indeed have the correct circuit board to replace the 10-21275KE part on your MaxxAir Fan with part # MA39FR. This is a direct replacement and will get your fan operating back to normal. Pricing will be listed on the product page.
view full answer... - Can Maxxaire Circuit Boards 10B21275KE and # 10-21275KE InterchangeThe 10B21275KE part # MA39FR replaces the 10-21275KE you mentioned as well so if you had an older model number you could use it in same application.
view full answer... - Replacement Circuit Board for MaxxAir Deluxe 7501KThe correct replacement circuit board for your MaxxAir Deluxe 7501K vent fan assembly is the # MA10A21275K and would be what you'd need to fix the issue you are having.
view full answer... - Replacement Circuit Board For A MaxxAir MaxxFan Deluxe 00-07501K Our part number for the 10C21275KE MaxxAir MaxxFan Circuit Board is part # MA39FR. This is for the exhaust only models like your 7501K and should get your fan back up and running. I don't know what type of troubleshooting you've done with the manufacturer but since the lid opens and closes it could also just be a bad fan motor # MA10-20968. The only way to test the motor would be to remove it from the vent and put power and ground to it to see if it starts turning. If so then it was just...
view full answer... - Replacement Circuit Board for MaxxAir Fan 4951KSCFor a replacement circuit board you can use the Replacement Printed Circuit Board for MaxxAir MaxxFan Plus Roof Vents # MA10A04751KS. We have confirmed with MaxxAir that this is the correct for what you have.
view full answer... - Replacement Circuit Board for MaxxFan 00-4000KSince you have the MaxxFan model 00-4000K the correct circuit board replacement part number from us is the part # MA10A21276K.
view full answer... - Troubleshooting MaxxFan RV Fan that Won't Open with RemoteIs there a clicking noise when the "close" button on the remote is pressed? Does the fan stop moving when the "close" button on the remote is pressed? If you hear a clicking noise then the motor is likely faulty but if the fan doesn't stop moving then the issue is likely a fault in the circuit board. My guess is it's the circuit board but since I do not know what model Maxxair you have for sure it's hard to say what you would need. You'd want the part # MA10A21275K if the fan is reversible...
view full answer... - Replacement Circuit Board MaxxAir RV Roof Vent 8501KI did some checking and for the MaxxAir the correct replacement circuit board is the # MA39FR.
view full answer... - Correct Replacement Circuit Board for a MaxxFan Deluxe 8501 Roof VentYes, the Replacement Printed Circuit Board for MaxxAir Powered Lift RV Roof Vents w/ Exhaust Only Fan # MA39FR is the correct replacement circuit board for your 8501 model.
view full answer... - Troubleshooting MaxxFan MA00-07500K Deluxe Foof Vent FanI 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... - Maxxfan Deluxe 7000K Max Fan Input Voltage MA39FRThe manufacturer (MaxxFan) would be the authority on the max input voltage of the # MA39FR. Since this was designed to be used on a 12 volt system a max voltage of 13.6 volts would be very reasonable all things considered. Some people may have gotten lucky with a 16 volt circuit that I would not consider that the norm and instead an exception.
view full answer... - Troubleshooting A MaxxAir MaxxFan That Keeps Trying To Close After Fully Shut Most likely it's the circuit board since it's the part that activates the motor. The circuit boards are model specific so you will need to purchase the correct board for your model. This means you will have to look at your fan to find the model number and identify which model you have in order to choose the correct replacement part. The Replacement Printed Circuit Board for MaxxAir Powered Lift RV Roof Vents w/ Reversible Fan # MA10A21275K is compatible with the following models: MaxxFan...
view full answer... - Replacement Circuit Board For a MaxxAir Fan With 10A21275KEZ On Board Identification TagThe Replacement Printed Circuit Board # MA39FR is the correct replacement for your MaxxAir circuit board 10a21275kez.
view full answer...
Do you have a question about this Accessories and Part?
Info for this part was:
Expert Research:
Jameson C
Updated by:
Wilson B
Updated by:
Manda E
Edited by:
Amanda M
Installed by:
Michael B
Written by:
Adam Y
At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.
Suzanne
7/28/2026
Still working along.