Rheem tankless water heater shows E35 and will not run

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Incorrect gas valve wiring, Shorted gas valve coil, Faulty main control board output, Wrong replacement gas valve installed

Safety first: Turn OFF power and gas. Gas valve work must be done carefully.

Verify correct parts: Confirm that any recently replaced gas valve is the correct Rheem part number for your model.
Inspect wiring: Check that each gas valve connector is on the correct terminal and fully seated. Look for pinched or shorted wires.
Check for visible damage: Look for burn marks or melted plastic on the valve or board.
Advanced testing: A technician should measure coil resistance and board output. Replace the gas valve or control board as indicated by tests.

Professional Required 5/5

Gas Control Valve Assembly

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