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Troubleshooting A MaxxAir Fan Model 4751KS That Wont Turn Off

Question:

I was curious as to what my problem could be. I have a maxxair fan model 4751ks that will not turn off. Also the fan will not open or close. Not sure if it is a bad circuit board or controller. I have tried disconnecting power and when reconnected fan remains stuck in on position.

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Expert Reply:

It sounds to me like your control board on your MaxxAir Fan Model 4751KS. The correct control board replacement for your unit is the Replacement Printed Circuit Board for MaxxAir Manual Lift RV Roof Vents # MA10A21276K.

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Kevin C

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