71
Noritz
Gas Valve Circuit Failure
Boiler displays error 71 and will not operate.
Advertisements
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Advertisements
Possible Causes
Shorted gas valve coil, Damaged gas valve wiring, Control board driver failure
How to Fix / Troubleshooting
Critical safety: Do not attempt to operate the boiler with a suspected gas valve fault. Turn OFF gas and power and contact a professional.
- 1. Visual inspection: With power OFF, inspect the gas valve and its wiring for burn marks, melted insulation, or signs of overheating.
- 2. Reseat connectors: Ensure the gas valve connector is fully engaged at both the valve and control board.
- 3. Do not bypass: Never bypass or jumper gas valve circuits. This is extremely dangerous.
- 4. Professional testing: A Noritz technician should measure coil resistance and board outputs and replace the gas valve or control board as needed.
Advertisements
Repair Difficulty
Professional Required
5/5
Required Part
Gas Valve Assembly
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements