Luxaire Flame Sense Out of Sequence or False Flame

Furnace LED displays code 44; unit may shut down unexpectedly during operation.

Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Stuck gas valve, Shorted flame sensor to ground, Control board flame circuit fault, Induced draft issues causing flame instability

How to Fix / Troubleshooting

Safety: This condition can be hazardous. Turn off gas and power and contact a qualified technician. Do not attempt to operate the furnace until inspected.

Limited checks:

Visual inspection: Look for damaged wiring at the flame sensor and gas valve. Do not attempt to disassemble the gas valve.
Do not bypass safety circuits: Never jumper flame sensor or gas valve terminals.

A technician will need to test the gas valve, flame sensor circuit, and control board, and verify safe combustion.

Repair Difficulty

Professional Required 5/5

Required Part

Gas Valve or Flame Sensor Circuit

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