Error Code 31 indicates an “Inlet Thermistor Fault” on your Rheem Continuous Flow Water Heater. This error signifies a problem with the sensor that measures incoming water temperature, essential for proper system operation.
Immediately switch off power at the isolation switch and close any open hot water taps. Because thermistor faults involve electrical components and precise temperature controls, this issue requires professional inspection. Contact Hilton Plumbing to safely diagnose and repair this fault.
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