Maybe, it only makes sense to me? I did not want to call the RV repairman out in this near-freezing weather. I “played” with the thermostat: “Off” for a couple of minutes, then cycle to “furnace.” Seventy degrees and no response. “Off” for a couple of minutes. Seventy-two degrees and no response. Slowly, with increments, the temperature was raised to eighty-four and furnace clicked “on.”
Reasonable conclusion? The thermostat has ceased to function accurately?