E8
MrCool Indoor Fan Motor or Overload Protection Fault

Indoor unit displays E8 and may shut down; often associated with overheating.

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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

Indoor fan motor not starting, Blocked air discharge, Faulty indoor fan motor capacitor (if used), Indoor PCB fan driver failure

How to Fix / Troubleshooting

Safety first: Turn off power at the breaker before removing the indoor unit cover.

Steps:

  • Check for obstructions: Open the front panel and ensure nothing is blocking the blower wheel or air outlet louvers.
  • Spin test: With power OFF, gently spin the blower wheel by hand. It should rotate freely without grinding or binding.
  • Restart and observe: Restore power and command the unit ON. Listen for the indoor fan starting. If the compressor runs but the fan does not, shut off power again.

Next actions: A non-spinning fan usually indicates a failed indoor fan motor or driver circuit on the indoor PCB. Replacement of the motor assembly is common and may be done by an experienced DIYer, but board-level work should be left to a technician.

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Repair Difficulty

Medium 3/5

Required Part

Indoor Fan Motor
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