Duo therm 4 button tstat

sorry for the late response here, been down with bronchitis ever since Christmas. looked at the board, could see where the contacts had come loose and decided that I didn't feel comfortable doing such fine soldering or spending the money or time on a 5 button change out. Talked to Mr. Frerichs on Christmas day, he was very helpful and I have a rebuilt thermostat on the way. He claims to have done over 300 of these and never had one returned. I might note that the existing tstat had been redone by someone else and the switch had been held down by some type of adhesive which had broken loose resulting in the broken welds. While I am not happy about having my motor home and trips hostage to a thermostat that can't be fixed/repaired on the road, at my age if I can get a few years out of this, I will probably be done with rving. Thanks to all who responded.