Maxxair fan possessed

[Steph and Dud B]

This summer our large Maxxair fan started randomly powering up on its own. Google says there's a known problem with condensation or moisture on the circuit board causing this but that seems unlikely because it was happening inside the garage with the trailer windows open, so the was no temperature differential between the trailer and the air. 

It happened again this morning so I pulled the fan apart. (Fun fact: Oliver caulks the trim ring to the ceiling.) The circuit board was perfectly dry and seemed fine except there was a spiders nest on it. I removed the spiders, blew the board clean, and reseated all the electrical connectors. Time will tell if that solved the problem.

Has anybody else had a problem with their fan powering up on its own?

Edited August 20 by Steph and Dud B
Typos

[thompsonkd]

Hello. Yes we have had the same issue with our fan. The fan began to open and close on its own, or not open at all. Friends who have a van conversion told us this is a know issue with MaxxAir fans. The fix is to replace the circuit board but first applying a specialized silicon used for electronics to the board. There are lots of YouTube videos detailing how to do this. The caveat is to be careful in taping off the parts of the board that should not have the silicon applied. We used a spray can of the silicon, our friends used the kind that is brushed on-probably doesn’t matter which kind is used. Regardless, the silicon is fairly expensive. We did that and it has worked so far. We also had the lift mechanism shatter, and we replaced that. Finally, the remote quit working and we replaced that as well. We use the fan all the time; it’s a great fan, just requires a fair amount of maintenance. 

[Steph and Dud B]

I believe this is the paint on version: https://a.co/d/36fqgVe

[thompsonkd]

Yes, that is the same brand we used, but brush on as opposed to spray. Be careful to tape what you don’t want protected or you’ll ruin your circuit board!