7 blinks
Moderate
York · HVAC Systems (AC, Furnaces, Heat Pumps & Thermostats)
Gas Valve Relay Fault
Quick Answer
Error code 7 blinks on your York HVAC Systems (AC, Furnaces, Heat Pumps & Thermostats) means: Gas Valve Relay Fault. This is usually fixable — see the step-by-step guide below.
Likely Causes
How to Fix It
1
Measure gas valve coil resistance across the terminals with a multimeter (typically 150-600 ohms)
2
Verify 24VAC is present at the gas valve leads during a call for heat
3
Check wiring continuity from the control board gas valve output to the gas valve connector
4
Verify the gas valve part number matches the furnace model requirements
5
Gas valve replacement involves gas piping work and must be performed by a licensed HVAC technician
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
Control board
Valve wiring harness
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