F3
Carrier Compressor Overload / Current Protection Error

Dehumidifier displays F3 and compressor operation is inhibited.

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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

Shorted compressor windings, Locked rotor compressor, Failed start relay or PTC, Low supply voltage causing high current draw

How to Fix / Troubleshooting

Safety first: Unplug the unit. Compressor terminals carry high voltage; testing should be done by qualified personnel.

Homeowner-level checks:

  • 1. Verify power supply: Plug the unit directly into a dedicated outlet. Avoid extension cords. Use a multimeter to confirm voltage is within 110–125 VAC (or local spec).
  • 2. Listen for compressor: When starting, if you hear a brief hum then a click and F3 appears, the compressor may be locked or the start device may be faulty.
  • 3. Allow cool-down: Let the unit sit unplugged for 30–60 minutes to cool the compressor, then retry. Overheating can temporarily trip the overload.

Technician-level work: Testing compressor windings, start relay/PTC, and current draw requires electrical expertise. If F3 persists, contact a Carrier service technician.

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Repair Difficulty

Professional Required 5/5

Required Part

Compressor Start Relay/PTC
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