Troubleshooting a Maxxfan 4700K Malfunctioning Under Shore Power

Question:

10a20281k-1af broke on Maxxfan 4700K Battery on camper when dead while sitting for several weeks, I plug the camper into 120v to charge the battery when I did this the Maxxfan came on by itself and tried to close the vent which was already close and broke the 10a20281k-1af I replaced the circuit board but it still does this when the battery switch is off and you plug to house current or turn the generator on. When the battery is charged and the battery switch is on the vent works fine and doesnt try to close the vent by itself

asked by: Thomas M

Expert Reply:

The battery will be charged off of the inverter so it makes no sense that your Maxxfan 4700K is operating correctly while only on battery power and not plugged in. Since you have already replaced your circuit board I recommend checking your wiring connections. If you have a wall mounted controller this is most likely malfunctioning and causing your issues. The problem could also be in your inverter.

We do offer the Replacement Lift Arm for MaxxFan Roof Vents item # MA10-20222KS to fix your broken lift arm.

expert reply by: Jerred H