If you’re looking for help fixing your Daikin furnace, look no further! Our comprehensive Daikin furnace repair guide will explain common issues, provide troubleshooting tips, and show you how to read your model’s error codes.
CODE: One LED flash that stays on continuously 
PROBLEM: No signal from the thermostat.
FIX: Turn off the unit’s power and check connections.
CODE: Single LED flash
PROBLEM: Furnace lockout due to an excessive number of ignition retries (3).
FIX: Locate and correct gas interruption. Reset by lowering it for 20 seconds and then raise it back, furnace will reset itself after one hour.
CODE: Two LED flashes
PROBLEM: Draft inducer is not operating or the pressure switch circuit has closed.
FIX: Replace the induced draft blower pressure switch, or repair the short.
CODE: Three LED flashes
PROBLEM: The pressure switch is open.
FIX: Pressure switch may need to be replaced.
CODE: Four LED flashes
PROBLEM: Pressure issue. High limit cut-off due to faulty wiring or bad filters.
FIX: Replace or clean the air filter; clean drain tubes of moisture or debris; may have an open limit switch that requires a jump, ensure not to run it with the main switch bypassed.
CODE: Five LED flashes
PROBLEM: The unit is sensing a flame without a call for heat.
FIX: Might be the result of a slowly closing valve. Turn off the gas until the valve is fixed.
CODE: Seven LED flashes
PROBLEM: Faulty flame sensor.
FIX: Flame sensor might be dirty or placed too far from flame. Clean if dirty, replace if defective.
CODE: Continuous LED flashing
PROBLEM: Polarity of volt power is reversed.
FIX: Review wiring diagram to correct polarity.
daikin furnace codes
