Noritz Error Code 72: Flame Rod/Gas Valve Issue

How to Fix Noritz Code 72

1. Step 1: Check the pilot light. If it's out, follow your Noritz water heater's manual to relight it.
2. Step 2: Inspect the flame rod for any signs of damage or buildup. Clean it gently with a wire brush if necessary.
3. 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

1. Turn off the unit using the power button on the front panel.
2. Turn off the gas supply valve.
3. Turn off the circuit breaker supplying power to the unit. Wait 30 seconds.
4. Restore power at the breaker, then open the gas valve.
5. Turn the unit back on. If the error returns, the underlying issue needs repair.

Resetting clears the code from the display but does not fix the underlying fault. If the code returns after reset, proceed to the diagnostic steps above.

What Does Noritz Error Code 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.

Common Causes

• Faulty flame rod or gas valve
• Incorrect gas pressure
• Clogged or dirty flame rod
• Wiring issues or poor connections

Diagnostic Steps

Replacement Parts

Related Codes on Same Models

Other codes that affect the same Noritz model families as 72.