Intermittent power issues take some tenacious investigation -
Disconnect 120 volt power to your coach.
Open the breaker panel, remove the breaker cover plate to access inside of the breaker panel.
Check all wire clamping screws for being tight and inspect all wiring/wiring connection points for overheating or burning. Repair or replace as needed.
Thermostats operate on low voltage that usually originates in the unit and feeds down to the thermostat. Compressor’s and fan motors are powered with 120vac.
Get yourself a wiring diagram/schematic for you AC units - that will be a good start. If your unit is a heat pump, then the wiring diagram/schematic will help, but if your heat is driven off a common thermostat but a separate unit like ours are, then it complicates things - especially when you have power at the thermostat. An LP MoHo/rv furnace usually works off of 12vdc only.
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