Daikin Blower Motor Not Running

Daikin furnace produces heat but the blower never starts; heat exchanger becomes very hot and unit may trip on high limit.

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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 Daikin ECM blower motor, Loose blower harness connection, Faulty blower relay or output on control board, Jammed blower wheel

How to Fix / Troubleshooting

Safety: Turn off power immediately if you notice very hot supply air with no blower operation. Overheating can damage the heat exchanger.

Steps to check:

  • Inspect blower compartment: Remove the blower door and check for obstructions in the blower wheel.
  • Check harness: Ensure the ECM motor plug is fully seated and wires are intact.
  • Spin test: Rotate the blower wheel by hand. If it is stiff or seized, the motor bearings may be failed.
  • Call for heat test: Restore power, call for heat, and observe whether the motor attempts to start. If there is no movement or only a brief twitch, the motor or board output is likely defective.

Blower motor and control board testing should be done by a technician with proper tools. Replace the Daikin ECM blower motor assembly if confirmed failed.

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Repair Difficulty

Hard 4/5

Required Part

Daikin ECM Blower Motor Assembly
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