Rheem / Ruud · Water Heater error code
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Guide · Water HeaterScale insulates the heat exchanger, causing overheat codes and fluctuating temperature. Flush with a pump and descaling solution through the isolation valves.
Guide · Water HeaterRumbling and popping are usually sediment and scale at the bottom of the tank (gas) or on the elements (electric). They rarely mean the tank is failing but they cut efficiency. Banging or squealing can also come from high pressure and thermal expansion, so check pressure before blaming sediment.
Guide · Water HeaterMany tankless complaints are water-side: flow below the activation threshold, a clogged inlet screen, low-flow aerators, or scale in the heat exchanger. Gas supply, venting and combustion codes are blocked: diagnose and refer. Read the code first, then work the water side.
Rheem / Ruud · Water Heater
11
No ignition
Rheem / Ruud · Water Heater
12
Flame failure / gas supply problem
Rheem / Ruud · Water Heater
14
Overheating
Rheem / Ruud · Water Heater
31
Inlet thermistor fault
Rheem / Ruud · Water Heater
33
Outlet thermistor fault
Rheem / Ruud · Water Heater
61
Combustion fan fault