Upon inspection found thermostat malfunctioning. Performed Thermostat factory reset . cycled system for proper operation after repairs. Furnace ( heat mode inspection after performing repairs ) Inspected inspected flue pipe, flue pipe is in good condition at this time. Inspected heat exchanger, heat exchanger is in ok condition at this time. Inspected high and low voltage wiring, all electrical wiring is intact and tight at this time. found at this time. Inspected burners, burners are ok at this time. Inspected flame sensor , sensor is working properly at this time. Inspected glow igniter, igniter is operating properly at this time. Inspected pressure switch and cleared both hoses, switch is operating properly at this time and hoses are cleared of debris at this time. Inspected all safeties, safeties are operating properly at this time. Inspected gas valve, gas valve is operating properly at this time. Inspected gas pressures in/out pressure are within manufacturer specs at this tim