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