What Causes MaxxAir Maxx Fan Lid Not to Open or Close

Question:

My Max Air fan will not open or close. What would cause this?

asked by: Christopher H

Expert Reply:

The two most likely causes of a MaxxAir vent fan lid not opening or closing are either going to be a lift motor or operator failure. I recommend removing the motor and applying power directly to this to see if the shaft turns. If not, you know the motor is bad and needs to be replaced for which we have the Replacement Lift Motor for Maxx Fan Plus Roof Vent part # MA10-20270. If the motor works properly then it's most likely a bad operator for which we have the Replacement Operator Mechanism part # MA10-20281K-1AF.

expert reply by: Conner L

Bill B.

2/23/2024

my motor will raise the lid until it stops but will not lower when close button is used. i have replaced the operator ( bought from e trailer), which i can use to manually open or close. i have tried changing control buttons but still does not work

Mike L.

2/23/2024

@BillB Can you tell us the model number of your Maxxair fan, please?

Bill

2/23/2024

@MikeL either a 4700k or 4900 k, i am looking at owners manual as cannot find a sticker anywhere and i have the bottom cover off. the pan is a " maxxfan pcb V 3.8

Bill

2/24/2024

@Bill it is a 4700K

See All (7) Replies to Bill B. ∨

Kyle

2/25/2024

My vent won’t open or close. It does however, beeps when I attempt to operate it. I got up there and cleaned off the sensor to no avail.

William B.

3/1/2024

T motor raises the lid and will not lower it, must be cranked down, the operator was changed already. i have swapped out a control panel from the other fan and does not work. i bought anew pcb, still does not close, i can reverse the wires to the opener and the lid will close but not open

3/27/2024

I removed the motor housing and was able to lift the vent hood easily (manually via twist knob). The motor is totally locked-up internally; even after removing the smaller exterior reductions gears. I used this fan one time; it's a shame. The second unit still functions property. I installed two 7500K units.

Dennis D.

10/24/2024

Replaced motor still needs help to lift, works fine coming down?

Jon G.

10/24/2024

@DennisD Have you tried checking the power source? Sometimes in this case the battery might be depleted or even a ground might be loose. The motor works fine coming down simply because of gravity and the motor not having to "push" against the load.