Originally Posted by CharlieD
look up "heat anticipation" for your particular furnace
Thanks for the suggestion.
I have a digital Coleman Mach Thermostat, which I don't believe has an adjustable heat anticipatory.
I do think it's a problem with the thermostat or the location of it.
Because once the furnace burn starts, the thermostat does a 2 degree increase within seconds and shuts down the furnace.
In the spring I plan to setup a room thermometer next to the thermostat to see if the room thermometer's temperature reading is consistent with the thermostat.
I'm hoping that will help start to isolate the cause.
Thanks again for your reply.