Norcold 1200 Preventative Maintenance

Doug, it was a dinosaur board and not an original. We are not positive it was going into the defrost mode. That was suggested by the factory person but did not attempt to prove it ourselves. Resetting the board seemed to cure the problem temporarily. My friend is in their rv on my property visiting and would find the temperatures raising what appeared to be ever day at about the same time. Could have been coincidence but without a real schematic for the thing I had little information to work with.

Seems that having the fans and cooling system shut off when the doors are opened is really adding another failure point in the system as in this case due to an intermittent relay.