Sime
Ignition Sequence Interruption
Water heater fan runs but burner does not light; no error code is displayed.
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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
Weak ignition spark, Incorrect electrode gap, Faulty flame sensor, Gas valve not opening despite fan operation
How to Fix / Troubleshooting
Safety: Turn off gas and power before adjusting electrodes.
Steps:
- Inspect ignition electrode: Check for cracks, soot, or misalignment. Clean and adjust according to Sime specifications (typically a few millimeters from burner surface).
- Check flame sensor: Clean the ionization electrode and ensure it is in the flame path.
- Observe through inspection window: When safe, watch for spark during startup. If there is no spark, the ignition transformer or board may be faulty.
Professional help: If there is spark but no flame, or no spark at all, a technician should test the gas valve and ignition circuit.
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Repair Difficulty
Hard
4/5
Required Part
Ignition Electrode
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