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Troubleshooting A MaxxAir MaxxFan That Isnt Functioning  

Updated 02/06/2023 | Published 02/04/2023

Question:

Hi there, I’m not sure what model I have of the maxx air fan. I think it may be 4500k model but not certain. Hopefully that doesn’t matter. But my problem is that it won’t turn on. It does have power however. I know this because if I turn the handle to open the fan lid. If I open it up halfway. Then cut power and then turn on the power. The fan will automatically wind the vent all the way shut. Any help would be greatly appreciated

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Expert Reply:

The first thing to check on your MaxxFan Plus Roof Vent w/ 12V Fan is still going to be the power and ground. You'll need to take a voltmeter like # PT89ZR and ensure that the vent is getting a full 12 volts of power otherwise it could only partially work, like you've been experiencing. Next is ensuring you have a good ground connection.

From there you'd be looking at replacing the circuit board. These are model specific so you'll need to take a look at yours and see the exact model number.

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 and MaxxFan Deluxe: 00-0700K, 00-07500K, 00-08500K, 00-08700K, and 00-08900K.

The Replacement Printed Circuit Board for MaxxAir MaxxFan Plus Roof Vents # MA10A04751KS is compatible with the following models: 4751KS, 4761KS, and 4951KS.

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Kevin C
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