E02
Raypak
False Flame / Flame Detection Fault
Boiler shows E02; flame detected when there should be none (false flame signal).
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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
Shorted flame sensor to ground, Moisture or condensation on burner or sensor, Faulty ignition control board, Electrical noise on flame signal circuit
How to Fix / Troubleshooting
Safety: Turn OFF power and gas.
Steps:
- 1. Inspect flame sensor wiring: Ensure the flame rod is not touching the burner or grounded metal except at its mounting point. Check the sensor wire for damaged insulation or shorts.
- 2. Dry moisture: Look for condensation or water in the burner area. Dry components and correct any source of water intrusion (leaks, vent issues).
- 3. Clean sensor: Remove and clean the flame sensor with a non-abrasive pad.
If E02 persists after cleaning and drying, the ignition control may be misreading the flame signal and should be evaluated by a technician.
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Repair Difficulty
Hard
4/5
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