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Daikin Furnace Error Codes

Error CodesWhat this meansHow to fix it
One LED flash that stays on continuouslyNo signal from the thermostat.Turn off the unit’s power and check connections.
Single LED flashFurnace lockout due to an excessive number of ignition retries (3).Locate and correct gas interruption. Reset by lowering it for 20 seconds and then raise it back, furnace will reset itself after one hour.
Two LED flashesDraft inducer is not operating or the pressure switch circuit has closed.Replace the induced draft blower pressure switch, or repair the short.
Three LED flashesThe pressure switch is open.Pressure switch may need to be replaced.
Four LED flashesPressure issue. High limit cut-off due to faulty wiring or bad filters.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.
Five LED flashesThe unit is sensing a flame without a call for heat.Might be the result of a slowly closing valve. Turn off the gas until the valve is fixed.
Seven LED flashesFaulty flame sensor.Flame sensor might be dirty or placed too far from flame. Clean if dirty, replace if defective.
Continuous LED flashingPolarity of volt power is reversed.Review wiring diagram to correct polarity.