If you’re looking for help fixing your ComfortMaker furnace, look no further! Our comprehensive ComfortMaker furnace repair guide will explain common issues, provide troubleshooting tips, and show you how to read your model’s error codes.

CODE: Steady LED flashing
PROBLEM: Normal operation
FIX: n/a

CODE: Two LED flashes
PROBLEM: Pressure switch stuck closed
FIX: Obstruction in pressure tubing

CODE: Three LED flashes
PROBLEM: Pressure switch stuck open or manual ON/OFF switch in off position
FIX: Proper vent size; defective inducer motor; excessive wind; faulty pressure switch; disconnected or obstructed pressure tubing; inadequate combustion air supply; or restricted vent

CODE: Four LED flashes
PROBLEM: The limit switch is open
FIX: Loose blower wheel; restricted vent; dirty air filter; defective blower; or excessive wind

CODE: Five LED flashes
PROBLEM: Flame has been sensed out of sequence
FIX: The gas valve is either leaking or stuck open

CODE: Six +1 LED flashes
PROBLEM: Soft lockout: maximum trials for ignition has been reached
FIX: n/a

CODE: Six +2 LED flashes
PROBLEM: Soft lockout: flame sense was lost while running, a cycling pressure switch, or blocked condensate
FIX: n/a

CODE: Six +3 LED flashes
PROBLEM: Soft lockout: the pressure switch was opened during run
FIX: n/a

CODE: Six +4 LED flashes
PROBLEM: Soft lockout: the limit switch was opened during run
FIX: n/a

CODE: Seven LED flashes
PROBLEM: Soft lockout: the main limit was open for too long (1-hour delay)
FIX: n/a

comfortmaker furnace codes

What Our Clients Are Saying About Us