Posted awhile back about thermostat issue in my C. They installed a White-Rogers unit that doesn't have a separate on/off switch...you just move dial to left down to 50 degrees and hear a small "click". Well, in January, with unit in the OFF position, temps went down into the 20's and guess what - furnace turned ON and used all my propane! Heard the blower motor whirling away and pulled the furnace fuse to shut it completely down. Took back to RV service and they weren't sure it was the wall unit. Next day they called and said they had 3 other clients call with the same situation using the same White-Rogers! Furnace was turned off but when temps went below the 50 degrees setting on unit, furnace came on! They replaced the thermostat with another brand. Just a FYI.
Interesting, when winterizing, there should be a shutoff switch that cuts power to the entire unit during storage; its sometimes labeled "storage". I've had three MHs and all and this shut off switch. It disconnects your batteries. And, during winterizing, its my practice to turn the propane tank values closed.
My C is a 2003 model. This was a new thermostat and it does have an "off" position to far left (no separate on/off button or switch like most have). The one they just replaced it with also doesn't have a separate on/off....just move temperature to far left until you hear a click. Fingers crossed this one actually KNOWS it's been turned off 🙂