E7
Rheem
Gas Solenoid Valve Circuit Fault
Rheem tankless water heater displays E7 and will not ignite
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Safety Warning
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.
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Possible Causes
Failed gas valve solenoid coil, Loose gas valve wiring connector, Faulty main control board gas driver circuit, Incorrect gas valve voltage
How to Fix / Troubleshooting
Safety first: Turn OFF power and close the gas shutoff valve. Gas work should be performed by a qualified technician.
- Visual inspection: Remove the front cover. Locate the gas valve assembly. Check for burnt connectors, melted plastic, or signs of overheating.
- Check wiring: Ensure the gas valve harness is fully seated on both the valve and the control board. Look for pinched or broken wires.
- Confirm gas supply: Verify the manual gas shutoff valve is open and that other gas appliances in the home are working.
- Electrical test (advanced): With power OFF, measure resistance of the gas valve solenoid coils and compare to Rheem specifications. Replace the gas valve assembly if coils are open or shorted.
- If unsure: Because improper gas valve service can cause fire or explosion, contact a licensed gas technician for diagnosis and replacement.
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Repair Difficulty
Professional Required
5/5
Required Part
Gas Control Valve Assembly
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