NT-20S Suburban Furnace problem with cycling
NT-20S Suburban propane furnace Gas on, power on new suburban thermostat installed.
Replaced thermostat( with another suburban one #161154) this season went camping and it worked perfectly.
We went camping this past weekend and the first 2 nights were chilly so I turned up the thermostat to take the chill off for the night- blower came on and heat began to flow and it rose to set temp , when thru cool down and it came back on 1, 2 more times then it didnt run again and we woke up cold. Turned off thermostat and furnace, then turned furnace back on, began to bring thermostat up and it" clicked to fire furnace, and again it ran normally 1-2 times then when it needed to come back on it didn't.
any thoughts as to what might be going on?