Marine air ac control panel

[Mknupp]

1995 330 sundancer, Ac works fine but fan speed changes by itself ?? Control panel bad? Thoughts appreciated

 

[dtfeld]

Edit: Spell check sucks. Corrected.

Which panel model? Contacts can be loose/corroded connection, or bad board.

Try unplugging cleaning contacts on both ends. If bad thermostat board, buy a new one, $200-300

 

[Mknupp]

Not sure, boat still in winter storage, thanks for your response, I will check all connections

 

[techmitch]

Not sure, boat still in winter storage, thanks for your response, I will check all connections

https://www.flightsystems.com/pdf/cruisair-troubleshooting-guide.pdf
https://www.flightsystems.com/smxii-replacement-keypad.html
Hope these help.

 

[Mknupp]

Is thermostat board considered control panel or something else

 

[Mknupp]

https://www.flightsystems.com/pdf/cruisair-troubleshooting-guide.pdf
https://www.flightsystems.com/smxii-replacement-keypad.html
Hope these help.

Thanks!!

 

[techmitch]

Thanks!!

Looks like you have the older control panel (SMX) as opposed to the newer SMXII but the trouble shooting guide I posted above should still apply.
It's the one on the top of this list. https://www.flightsystems.com/marine-repair-services.html

 

[dtfeld]

Control board, thermostat its the white square thing in your picture. Hopefully a bad connection, but they are getting old enough to just outright fail. I replaced a thermostat with a new thermostat on a system that was acting similar to yours. I had SMXII, but same procedure. I think they quit repairing a year or two ago.

When I replaced my AC last year, I went with one of these

https://www.microair.net/products/easytouch-oem-control-display?variant=21562403389524

 

[Blueone]

Marine air themselves has good over the phone troubleshooting….there is a lot of checks on my newer models to narrow the problem down….worth a try