Caple
Incorrect Combustion / Air–Gas Mixture Fault
Gas hob produces yellow, lazy flames or soot on pans.
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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
Blocked burner ports, Incorrect burner cap fitted, Wrong gas type or injector size, Insufficient primary air due to blocked air inlets
How to Fix / Troubleshooting
Safety first: Poor combustion can produce carbon monoxide. If you smell strong gas or feel unwell, turn off gas, ventilate the room, and seek professional help immediately.
User steps:
- Turn off the hob and allow burners to cool.
- Remove burner caps and heads; clean thoroughly with warm soapy water and a soft brush.
- Ensure the correct caps are fitted to each burner (sizes must match).
- Check that air inlets around the burner base are not blocked by spills or debris.
Technician steps:
- Verify that the hob is set up for the correct gas type (natural gas vs LPG) and that the correct injectors (nozzles) are fitted.
- Adjust primary air shutters if present, following Caple specifications.
- Perform a combustion check and adjust as required.
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Repair Difficulty
Medium
3/5
Required Part
Gas Burner Injector Set
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