E7
Certikin
Fan Motor / Fan Relay Fault
E7 error; heater may not start fan or ignition sequence.
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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
Failed combustion fan motor on Certikin heater, Stuck or burnt fan relay on PCB, Seized fan bearings, Broken fan wiring harness
How to Fix / Troubleshooting
Safety first: Isolate power before working near the fan or control board.
- Check fan spins freely: With power off, gently rotate the fan impeller by hand. It should move smoothly without grinding.
- Inspect wiring: Look for loose or burnt connectors at the fan motor and on the PCB.
- Listen on start-up: Restore power and call for heat while listening for any attempt by the fan to start (humming or brief movement).
- Do not force operation: If the fan does not run, do not bypass safety circuits.
Fan motor and relay testing requires electrical measurements and should be carried out by a qualified technician.
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Repair Difficulty
Professional Required
5/5
Required Part
Certikin combustion fan motor
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