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Maxxfan Circuit Board Troubleshooting on MA00-04000K Fan

Question:

Hey so I just bought a new circuit board for my maxxfan. Thought that was the issue fan would spin but couldn’t turn it off. I get a single beep when reconnecting to power but on/off in/out controls still don’t work. Any suggestions?

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Expert Reply:

The Replacement Printed Circuit Board for MaxxAir Manual Lift RV Roof Vents # MA10A21276K is the correct replacement for the # MA00-04000K. If that is what you got, then there appears to be an issue with the board as that is the "brains" of the unit. There could be a sticking button or a bad connection. I think if you have the right board, the chances of it being bad are extremely slim, but I don't know what else would cause the issue you have as that unit doesn't have the rain senor and those two components are the only components that impact what you are experiencing.

If you purchased a different board as there are many options, then that is likely the issue. This particular board is only a fit for the # MA00-04000K, # MA00-05100K, and # MA00-06200K models. The board is 10B21276K and replaces 10A21276K.

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