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Troubleshooting A MaxxAir MaxxFan That Keeps Turning Off

Question:

Changed circuit board but fan still shuts off after 10 seconds or so.

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Expert Reply:

Your 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 gauge of the wire. You'll also want to check all of the wiring for any loose connections.

2. Circuit boards are model specific so you could have purchased the incorrect board for your model.

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.

The Replacement Printed Circuit Board for MaxxAir Powered Lift RV Roof Vents w/ Exhaust Only Fan # MA39FR is for the following models: MA00-04751KSX.

3. You could have your fan set to Auto mode which will turn the fan off based on the preset temperature of the thermostat. Ensure your in manual mode and retest the fan.

4. Your fan motor could just be going out and will need to be replaced. You can use the Replacement 12-Volt Variable Speed Fan Motor for MaxxAir MaxxFan RV Roof Vents # MA10-20968.

If you've gone through all these steps and your MaxxFan still isn't properly operating then please reply back and we can troubleshoot further.

expert reply by:
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Kevin C

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