Gas Water Heaters
Troubleshooting
Medium Safety
What do tankless water heater error codes mean?
Tankless water heater error codes usually fall into five categories: ignition problems, venting issues, overheating, water flow problems, or sensor faults. The code helps narrow down what’s wrong, but the fix often requires a technician since these parts are inside advanced technological units. Check that your gas is on, water valves are open, and outdoor vents are clear. For a full breakdown of error codes by brand including Rinnai, Navien, Noritz, Takagi, and Rheem, visit chooseaaronservices.com/tanklesserrors.
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