5 flashes
Moderate
Goodman · HVAC Systems (AC, Furnaces & Heat Pumps)
Flame Sensed Without Gas Valve Energized
Quick Answer
Error code 5 flashes on your Goodman HVAC Systems (AC, Furnaces & Heat Pumps) means: Flame Sensed Without Gas Valve Energized. This is usually fixable — see the step-by-step guide below.
Likely Causes
How to Fix It
1
Turn off the gas supply to the furnace immediately
2
Use a combustible gas detector to check for gas leaks at the gas valve and burner area
3
Disconnect the flame sensor wire and check if the error clears
4
If gas is leaking through the valve, the gas valve must be replaced
5
This is a safety-critical fault. Only a licensed HVAC technician should diagnose and repair
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Gas valve assembly
Flame sensor
Control board
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