41
Intergas
Fan Speed / Tachometer Fault
Boiler displays error code 41, intermittent fan operation, boiler locks out
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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, Loose fan connector, PCB tachometer input fault, Mechanical resistance in fan
How to Fix / Troubleshooting
Warning: Internal fan diagnostics must be performed by a qualified engineer.
- Note behaviour: Record whether the fan starts then stops, or runs at unusual speeds before the fault appears.
- Reset boiler: Reset once. If the error recurs, call an engineer.
- Engineer tasks: The engineer will check the fan tachometer signal, wiring, and replace the fan or PCB if necessary.
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Repair Difficulty
Professional Required
5/5
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