11-25-2016, 06:01 AM
You also have a really unusual problem that nothing comes on when the low circuit is on and the compressors are in their original wiring,but switching the compressor wiring causes the unit to activate in low mode. The thermostat is not the first place I would look since the thermostat wiring doesn't explain the phenom.
At this point I would disconnect the leads for both the inside and outside fan, set the tstat on low and measure the voltage at the board going to the fans, then set the tstat on high and measure again. If the voltage works like it is supposed to then you may have a wiring problem to the fans. If the voltage is not responding as it should then you probably have a board problem.
Is this the unit I which the fan motor was replaced a few years ago? Has this unit ever been serviced while you have owned the coach? Did this low setting behavior coincide with the installation of the tstat?
At this point I would disconnect the leads for both the inside and outside fan, set the tstat on low and measure the voltage at the board going to the fans, then set the tstat on high and measure again. If the voltage works like it is supposed to then you may have a wiring problem to the fans. If the voltage is not responding as it should then you probably have a board problem.
Is this the unit I which the fan motor was replaced a few years ago? Has this unit ever been serviced while you have owned the coach? Did this low setting behavior coincide with the installation of the tstat?
Richard and Rhonda Entrekin
99 Newell, 512
Maverick Hybrid Toad
Inverness, FL (when we're home
)