Electrolux Split AC Error Code HC — What It Means & How to Fix It

What Does This Error Mean?

HC means the Power Factor Correction (PFC) circuit has detected an abnormal electrical condition and shut down. The PFC circuit ensures the AC uses power efficiently — it protects the inverter from dirty or unstable mains power. This usually points to a power supply quality issue or a fault on the outdoor PCB.

Affected Models

Electrolux EXH09HL1W
Electrolux EXH12HL1W
Electrolux ESV09CRK
Electrolux EWHI09
Electrolux Inverter Split System

Common Causes

Unstable or poor-quality mains power supply causing voltage spikes
Faulty or degraded capacitor on the PFC circuit board
Failed PFC inductor or rectifier component on the outdoor PCB
Loose mains wiring connection at the outdoor unit terminal block
Severe voltage fluctuations from overloaded shared circuit or neighbourhood supply issues

How to Fix It

Turn off the AC at the remote and switch off the circuit breaker.

Allow the unit to fully power down before doing anything else.
Check whether other appliances on the same circuit are running normally.

If lights are flickering or other devices behave oddly, the mains supply may be the issue.
Wait 10 minutes, restore power, and attempt one restart.

If HC was triggered by a brief voltage spike, it may clear on its own.
If HC reappears, do not keep restarting — call a licensed HVAC technician.

Repeated attempts can cause further stress to the PFC components.
Ask the technician to also check mains supply voltage quality at the unit.

A power quality issue will cause HC to return even after a board replacement.

When to Call a Professional

HC is almost always a job for a licensed technician or electrician. The PFC circuit involves high-voltage components inside the outdoor unit — dangerous without training. An electrician should also check your mains supply quality before the board is replaced.

Frequently Asked Questions

What does PFC mean in an air conditioner?

PFC stands for Power Factor Correction — a circuit that makes the inverter draw power more efficiently. Without it working correctly, the inverter can be damaged by reactive power or voltage spikes. Most modern inverter ACs include a PFC circuit in the outdoor unit.

Can bad power supply cause HC error?

Yes — voltage spikes, sags, or high harmonic distortion can all trigger HC protection. If your neighbourhood has unstable power, a voltage stabiliser may help. An electrician can test your supply with a power quality analyser to confirm this.

Is HC the same as a high voltage error?

No — HC is specifically about the PFC circuit, not general mains voltage level. PH (high voltage) triggers when the mains supply is above the safe operating range. HC can appear even with normal voltage if a PFC component has failed internally.