10
Intergas
Fan Speed / Tachometer Fault
Boiler shows code 10 and will not fire, fan may 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
Faulty fan speed sensor, Fan motor failure, Blocked fan impeller, PCB fan control fault
How to Fix / Troubleshooting
Safety first: Isolate power. Do not run the boiler with a known fan fault, as safe combustion cannot be guaranteed.
Checks (technician):
- Inspect fan: Remove the combustion cover and visually inspect the Intergas fan and venturi for debris or damage. Ensure the impeller spins freely by hand.
- Check connections: Verify that the fan plug and tachometer/speed sensor connections are secure on the PCB.
- Measure supply voltage: With a call for heat and appropriate safety precautions, measure the voltage supplied to the fan. If voltage is present but the fan does not run, replace the fan assembly.
- Check tachometer signal: Using an oscilloscope or multimeter (if specified by Intergas), confirm that the fan speed signal returns to the PCB. If absent, replace the fan; if present but not recognized, suspect the PCB.
Fan and PCB replacement should be carried out only by an Intergas-trained technician.
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Repair Difficulty
Professional Required
5/5
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