7 flashes = Gas valve internal fault. The integrated gas control assembly has detected an internal failure.
What this means
Gas valve includes: main solenoid, pilot solenoid, thermostat, ECO safety, FVIR sensor, LED indicator. Internal self-test detected fault in one of these.
Common scenarios
- Power surge damage
- Water damage from condensation or leak
- Insect damage in burner area
- End of service life (gas valves typically 12-15 years)
Reset attempts
Cycle gas valve through off → pilot → on three times. If 7 flashes persists, valve is failed.
Cost
- Gas valve assembly: $200-400 OEM
- Labor: $250-500
- Total: $450-900
Replace valve or replace unit?
On 8+ year-old units, replacement approaches 50% of new-unit cost. Most installers recommend new unit. Inside warranty — always replace valve.
Bottom line
7 flashes = dealer call. Not DIY. Consider new unit for older heaters.