5 blinks
Moderate
York · HVAC Systems (AC, Furnaces, Heat Pumps & Thermostats)
Flame Sensed With No Call for Heat
Quick Answer
Error code 5 blinks on your York HVAC Systems (AC, Furnaces, Heat Pumps & Thermostats) means: Flame Sensed With No Call for Heat. This is usually fixable — see the step-by-step guide below.
Likely Causes
How to Fix It
1
Turn off gas supply to the furnace immediately as this indicates a potential gas safety issue
2
Use a combustible gas detector to check for gas leaks near the gas valve and burner area
3
Disconnect the flame sensor wire and check if the error clears
4
Test the gas valve by disconnecting its electrical leads and checking for gas flow (there should be none)
5
This is a safety-critical fault. A licensed HVAC technician must diagnose and repair this condition
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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