Noritz Error Code 72: Flame Rod/Gas Valve Issue
Warning: Your Noritz water heater is experiencing a flame rod or gas valve issue, which has caused it to shut down. It's safe to troubleshoot, but call a professional if you're unsure.
How to Fix Noritz Code 72
- Step 1: Check the pilot light. If it's out, follow your Noritz water heater's manual to relight it.
- Step 2: Inspect the flame rod for any signs of damage or buildup. Clean it gently with a wire brush if necessary.
- Step 3: If the problem persists, call a professional HVAC technician. They can diagnose and repair the issue safely.
How to Reset Noritz Code 72
- Turn off the unit using the power button on the front panel.
- Turn off the gas supply valve.
- Turn off the circuit breaker supplying power to the unit. Wait 30 seconds.
- Restore power at the breaker, then open the gas valve.
- Turn the unit back on. If the error returns, the underlying issue needs repair.
What does 72 mean?
Noritz error code 72 indicates a problem with either the flame rod or gas valve in your water heater. The flame rod detects the presence of a flame, while the gas valve controls the flow of gas. When either of these components fails, your water heater will shut down to prevent a potential gas leak or fire hazard. This error is common in Noritz water heaters, especially in models with electronic ignition.
Affected Models
Replacement Parts
| Part | OEM Number | Est. Cost |
|---|---|---|
| Flame Rod | Noritz 8007200000 | — |
| Gas Valve | Noritz 8007100000 | — |
Related Codes on Same Models
| Code | Description | Severity |
|---|---|---|
| 10 | Flame Failure | Warning |
| 11 | Ignition Failure | Warning |
| 12 | Flame Loss | Warning |
| 14 | Thermal Fuse Failure | Warning |
| 16 | Over-Temperature | Warning |
| 29 | Condensate Drain Issue | Warning |
| 31 | Inlet Thermistor Failure | Warning |
| 32 | Outlet Thermistor Failure | Warning |
| 33 | Heat Exchanger Thermistor Failure | Warning |
| 43 | Water Level/Neutralizer Issue | Warning |