York Aircon HC Error Code & Blinking Light
Capture the York HC fault correctly, then see what should be checked before parts are quoted.
What does York HC mean?
York HC is listed as PFC protection in Inverter Split, Multi-Split rows such as York P Series 9K-12K 115V wall-mounted ductless. This meaning comes from the manufacturer's own diagnostic material. Confirm the exact model, series, or signal row before accepting a parts quote.
Compressor start, lock, overcurrent, overload, or inverter-drive protection.
Power-module, IPM, voltage, or wiring fault affecting compressor drive.
Compressor mechanical or winding issue after electrical checks are confirmed.
What to do now
Use these steps before customer action or a parts quote.
Stop using the unit if HC returns
Stop repeated restarts if HC returns; compressor and inverter faults can become more expensive when forced to run.
No manufacturer reset steps listed for HC
Capture the complete HC pattern and model stickers first. The manufacturer lists no customer reset procedure; do not treat a generic power-cycle as manufacturer guidance.
Send these to us
HC error code and blinking light, a clear display photo and blinking-light video if the unit shows one, York model stickers, affected rooms, operating state when the code appeared, and trip timing and outdoor-unit behaviour
Guidance for your model
Notes that match the code to your exact model. Electrical, refrigerant, wiring, resistance and component checks are for a technician.
| Detail | What it says |
|---|---|
| Diagnostic note | Check power-factor-correction circuit, power supply, and outdoor inverter board. |
| Singapore / model note | YorkNow / Johnson Controls P Series technical-guide row. Use for the listed P Series 9K-12K 115V wall-mounted ductless family, not as a Singapore YHFF fault-code table. |
- Detail
- Diagnostic note
- What it says
- Check power-factor-correction circuit, power supply, and outdoor inverter board.
- Detail
- Singapore / model note
- What it says
- YorkNow / Johnson Controls P Series technical-guide row. Use for the listed P Series 9K-12K 115V wall-mounted ductless family, not as a Singapore YHFF fault-code table.
What to check before repair
Use this split to separate safe evidence capture from the tests a technician should prove before quoting parts.
| You can check | Technician should confirm |
|---|---|
| Before taking any system action on HC, take a clear display photo and blinking-light video if the unit shows one. | Confirm whether HC is compressor start, overload, lock, or drive protection. |
| Capture the York indoor and outdoor model stickers so the correct family row is used. | Check supply voltage, inverter output, IPM status, compressor current, and winding readings. |
| The manufacturer lists no customer reset procedure for this code. Note whether one room, several rooms, or the whole system is affected. | Review trip history and compressor mechanical signs before quoting replacement. |
- You can check
- Before taking any system action on HC, take a clear display photo and blinking-light video if the unit shows one.
- Technician should confirm
- Confirm whether HC is compressor start, overload, lock, or drive protection.
- You can check
- Capture the York indoor and outdoor model stickers so the correct family row is used.
- Technician should confirm
- Check supply voltage, inverter output, IPM status, compressor current, and winding readings.
- You can check
- The manufacturer lists no customer reset procedure for this code. Note whether one room, several rooms, or the whole system is affected.
- Technician should confirm
- Review trip history and compressor mechanical signs before quoting replacement.
What changes the next step
These clues decide whether the first check is room-side, shared outdoor-side, refrigerant-side, listed-meaning, or model-family confirmation.
| What you see | What it points to |
|---|---|
| Only one indoor unit shows HC. | The affected room, indoor board path, wiring route, or local component should be checked first. |
| Several rooms or the outdoor unit show the same HC fault. | Prioritise the shared outdoor side, power path, and source-listed system branch. |
| The outdoor unit hums, starts briefly, or trips soon after startup. | Power, inverter, IPM, compressor current, and winding checks decide the repair path. |
| The model family is different from the row you found online. | Use the model or series filter first; same-looking codes can still belong to different diagnostic tables. |
| The model belongs to Inverter Split, Multi-Split rows such as York P Series 9K-12K 115V wall-mounted ductless. | This meaning comes from the manufacturer's own diagnostic material. Match the code to your model's listing before parts are quoted. |
- What you see
- Only one indoor unit shows HC.
- What it points to
- The affected room, indoor board path, wiring route, or local component should be checked first.
- What you see
- Several rooms or the outdoor unit show the same HC fault.
- What it points to
- Prioritise the shared outdoor side, power path, and source-listed system branch.
- What you see
- The outdoor unit hums, starts briefly, or trips soon after startup.
- What it points to
- Power, inverter, IPM, compressor current, and winding checks decide the repair path.
- What you see
- The model family is different from the row you found online.
- What it points to
- Use the model or series filter first; same-looking codes can still belong to different diagnostic tables.
- What you see
- The model belongs to Inverter Split, Multi-Split rows such as York P Series 9K-12K 115V wall-mounted ductless.
- What it points to
- This meaning comes from the manufacturer's own diagnostic material. Match the code to your model's listing before parts are quoted.
Compressor drive or replacement decision
York HC can still be a repair if power, inverter, or module checks find the cause. Compressor replacement should be weighed against age, warranty, and the rest of the system condition.
Inverter or IPM faults are not the same as confirmed compressor mechanical failure.
Compressor winding and current readings should be measured before replacement is discussed.
Older systems need a repair-versus-replace check if compressor-side parts are expensive.
York HC questions
What does the York HC error mean?
Can I fix a York HC error myself?
Is it safe to keep running the aircon with an HC error?
What causes a York HC error?
Will a York HC error need a repair or a full replacement?
What should I send a technician about a York HC error?
Confirm the fault
Share the error code, model number and symptoms so we can assess the likely cause.
Not the right code?
Browse the full York list or check a few codes in the same fault category.
Describe your situation
Tell us what’s going on. Symptoms, setup, photos, anything we should know. We’ll assess and come back with the right next step.
Read next
Use these if the quote mentions the parts, checks, or repair path this code points to.