Clients called us out today due to second floor. Furnace is being intermittent tech went out. Furnace is only two years old filter is clear no error codes recorded on control board after discussing with the client. Some of the symptoms they have been noticing the furnace will periodically heat to the design temperature And once it’s reached, will shut off and not come back on tech remove the panels on the furnace and jumper terminal R and terminal W to call for heat. Furnace fired up without issues. Tech noted. There’s no weird noises puffs or lockouts from the furnace tech quoted to perform diagnostic however, after discussing with client tech suspects the nest thermostat is malfunctioning after discussing with clients on site. Should the furnace continue to be intermittent? They will replace the thermostat from the main floor to the second floor to test the thermostat. Should it still continue to be intermittent? They will call us back to perform a diagnostic furnace appears to be op