F7 error, unit reports gas valve or gas supply problem, no ignition

Critical safety: If you smell gas, do not attempt repairs. Ventilate the area, do not operate electrical switches, and contact your gas supplier or emergency services.

• Check external gas shutoff: Ensure the manual gas cock supplying the water heater is fully open and in line with the pipe.
• Inspect gas valve wiring: With power off, remove the front cover and locate the gas valve. Confirm that the electrical connector is fully seated and that wires are not damaged or burnt.
• Verify gas type: Confirm that the heater is configured for the correct gas type (natural gas or LPG) and that the supply matches the rating plate. Using the wrong gas type requires professional conversion.
• Professional pressure test: Gas inlet and burner pressures must be checked with a manometer by a licensed gas technician. Do not attempt to adjust internal gas valve screws yourself.
• Reset fault: After ensuring proper gas supply and connections, restore power and reset the F7 error. If the code reappears, the gas valve assembly may need replacement by a qualified technician.