E5
Haier
Overcurrent Protection / Compressor Overload
Indoor unit shows E5 and the compressor does not start or stops quickly; sometimes accompanied by humming from outdoor unit.
Advertisements
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.
Advertisements
Possible Causes
Shorted or locked compressor, Faulty compressor drive on outdoor PCB, Incorrect supply voltage or loose power connections, Shorted outdoor fan motor causing high current
How to Fix / Troubleshooting
Safety first: Turn off the breaker and verify power is off with a suitable tester before opening any electrical covers.
- Check supply voltage: Have a qualified person measure line voltage at the outdoor unit terminals to ensure it matches the nameplate rating and is stable.
- Inspect wiring: Open the outdoor control box and inspect for burnt wires, loose terminals, or signs of arcing. Tighten loose screws and replace damaged wires.
- Check outdoor fan: Spin the fan blade by hand (power off). It should rotate freely. A seized fan can cause overcurrent; replace the fan motor if stiff or burnt.
- If E5 remains: The compressor or inverter module on the outdoor PCB may be failing. This requires specialized testing and usually replacement of the outdoor main PCB or compressor by a professional.
Advertisements
Repair Difficulty
Professional Required
5/5
Required Part
Outdoor Main Control PCB
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements