What It Means
Outdoor compressor direct operating current exceeding rated limit.
York All Systems
York Error Code F2
Troubleshooting guide for the York system fault F2.
Possible Causes
- Refrigerant charge anomaly or system restriction.
- Dirty outdoor condenser coil or fan motor failure.
- Compressor winding failure or mechanical binding.
- Low incoming AC supply voltage driving excess amp draw.
Not sure which one it is — or if it's none of these? Try ACLogics today.
Disclaimer: This information is for general reference. Error codes can vary by model and production year. Always refer to your machine's specific manual and the information printed on the unit itself.
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Full Diagnosis
F2 trips when the outdoor board measures the compressor drawing current above its rated limit — a direct compressor-current reading. This is distinct from F1, which protects the IPM driver module rather than the compressor itself, and from F23, which checks single-phase current within the compressor circuit as a narrower subset of this same protection; F22, by contrast, monitors the outdoor unit's overall incoming AC current rather than the compressor alone. When F2 trips, the outdoor unit locks out the compressor, stopping cooling/heating for all indoor units served by that outdoor module.
All Recorded Causes
Check refrigerant charge — overcharge, undercharge, or a restriction can all drive compressor current out of range. Inspect the outdoor condenser coil and fan for airflow restriction or a failing fan motor that reduces heat rejection and raises compressor load. Test compressor winding resistance and insulation for signs of a failing compressor. Verify supply voltage is within range, since low voltage causes compressors to draw higher current for the same load.
Verify Before Replacing Parts
- Confirm the exact York model family and default context before acting on a generic code description.
- Verify airflow first, then confirm operating pressures and temperature relationship before adjusting charge, since check refrigerant charge — overcharge, undercharge, or a restriction can all drive compres….
- Look for restrictions, iced coils, or dirty heat-transfer surfaces that can mimic a charge problem, and separately confirm inspect the outdoor condenser coil and fan for airflow restriction or a failing fan motor….
- After the correction, run the system long enough to confirm the default fault does not return under normal load.
Not sure which system this York code is on?
ACLogics has guided diagnostics for 60 York fault codes and asks the right questions to narrow it down.
