E30
Rheem
Flame Rod Short / Ground Fault
Rheem tankless water heater shows E30 and will not start
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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
Flame rod touching burner or metal surface, Damaged flame rod insulator, Water intrusion around flame rod, Shorted flame rod wiring
How to Fix / Troubleshooting
Safety first: Turn OFF power and gas. Allow the unit to cool.
- Access flame rod: Remove burner access panel. Locate the flame rod assembly.
- Inspect insulator: Check the ceramic insulator for cracks or carbon tracking. Replace the flame rod if damaged.
- Check clearance: Ensure the metal rod is properly positioned in the flame and not touching the burner or other metal parts.
- Inspect wiring: Look for damaged insulation or pinched wires that could be shorting to ground.
- Dry moisture: If there is condensation or water near the flame rod, dry the area and correct any leaks.
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Repair Difficulty
Hard
4/5
Required Part
Flame Rod Assembly
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