22
Day & Night Inducer Motor Fault / Pressure Switch Not Proving

Furnace LED flashes code 22; inducer may not start or runs briefly then stops. No ignition sequence proceeds.

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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 inducer draft motor, blocked inducer wheel, seized inducer bearings, open inducer motor winding

How to Fix / Troubleshooting

Safety first: Turn off power to the furnace before removing any panels.

  • Listen for inducer: Call for heat and listen at the furnace. If the inducer motor does not start or hums loudly without spinning, it may be failed.
  • Inspect venting: With power OFF, check the PVC or metal vent pipe connected to the inducer housing for obstructions (ice, nests, debris). Do not insert tools deeply into the vent.
  • Check inducer wiring: Remove the burner compartment door and locate the inducer motor assembly. Verify the electrical connector is fully seated and wires are intact.
  • Spin test: With power OFF, gently try to spin the inducer fan wheel through the housing opening (if accessible). It should spin freely without grinding.

If the inducer is noisy, seized, or not receiving proper voltage from the control board, it will need professional diagnosis and likely replacement with a Day & Night-compatible inducer assembly.

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Repair Difficulty

Hard 4/5

Required Part

Inducer Draft Motor Assembly
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