Vokera water heater displays code 15, appliance fails to detect flame correctly, intermittent hot water
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.
Possible Causes
How to Fix / Troubleshooting
Safety first: Turn off power and gas before removing the combustion cover. Only a qualified engineer should access the burner area.
Owner observations:
- Note whether the burner lights briefly then goes out, and whether the code appears during or after ignition.
Engineer actions:
- Remove and clean the flame sensing electrode with fine abrasive pad; check for cracks and correct positioning in the flame.
- Verify a solid earth connection between the appliance chassis and mains earth.
- Check gas pressure and combustion and adjust if necessary.
- Test the PCB flame detection circuit and replace the PCB if defective.
Because this involves combustion control, repairs must be done by a competent gas engineer.
Repair Difficulty
Required Part
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