Rinnai Gas Continuous Flow Error Code 72

Rinnai Gas Continuous Flow Error Code 72

What is Error Code 72?

This error points to a flame detection circuit fault. The system isn’t able to verify the flame during ignition, even if the burner is operating.

How to Fix Error Code 72

It may be caused by carbon buildup on the flame rod, wiring issues, or a faulty sensor. Cleaning or replacing the sensor is typically required—this is a job for a licensed gas fitter.

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