Service personnel arrived and checked over the furnace and then stated it is your thermostat He then stated he had thermostats in his truck So to replace a twenty five dollar thermostat it cost 250$ for the thermostat and 89$ for service call. In hind site we could have picked up a thermostat at Lowes and installed it and saved ourselves $200 dollars OR we could have been given a cheaper option sense it was for a garage