Came out to investigate a clunking noise and a possible no heat. When I arrived, the house was holding at 60° which is where Deb had it set to. There were no fault codes and the furnace started up just fine. I cycled the furnace four times all together and never had a clunk noise take place. I called Deb and let her know to keep monitoring the situation and to call us back if it continues or gets worse.