CODE 22
Fraser-Johnston
Blower Fault or Lockout
LED flashes two short and two long blinks; blower runs at low speed; no heat.
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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 ECM blower motor, Faulty blower relay on IFC board, Open blower capacitor (PSC motors), Seized blower wheel
How to Fix / Troubleshooting
Safety first: Turn off power before working on the blower assembly.
- Check blower wheel rotation: Remove the blower compartment door and try to spin the blower wheel by hand. It should rotate freely. If it is stuck or scraping, debris or a failed bearing may be the cause.
- Inspect motor capacitor (PSC): If your Fraser‑Johnston furnace uses a PSC motor, locate the run capacitor. Look for bulging or leaking. Replace with the same microfarad rating and voltage if defective.
- Check motor wiring harness: Ensure the multi‑pin connector from the ECM motor to the control board is fully seated and undamaged.
- Test motor operation (advanced): A technician can apply power directly to the motor or use diagnostic tools for ECM motors. If the motor does not run when commanded, it likely needs replacement.
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Repair Difficulty
Hard
4/5
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