What It Means
Outdoor unit incoming AC line supply overcurrent trip.
York All Systems
York Error Code F22
Troubleshooting guide for the York system fault F22.
Possible Causes
- Excess total unit current draw measured at outdoor PCB.
- Blocked condenser coil, dirty filter, or restricted airflow.
- Failing compressor or fan motor drawing excess current.
- Damaged outdoor PCB current transformer or sensing circuit.
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
F22 trips when the outdoor unit's incoming AC line current exceeds the safe threshold monitored by the outdoor PCB — a whole-unit input-current protection rather than a component-specific one. This differs from F2, which reports overcurrent specifically at the compressor drive, and from F23, which is a single-phase overcurrent check within the compressor circuit; F22 is the broader AC-supply-side guard. When it trips, the outdoor unit shuts down compressor and fan operation, which cuts cooling/heating to all indoor units served by that outdoor unit.
All Recorded Causes
Verify incoming line voltage and current draw against the unit's nameplate rating with a clamp meter. Check for a failing compressor, blocked condenser coil, or restricted airflow forcing the compressor to draw excess current. Inspect the outdoor PCB's current sensor/CT and wiring for damage or a bad connection. Confirm the outdoor unit isn't oversubscribed by too many indoor units or running with a dirty filter/coil across the system.
Verify Before Replacing Parts
- Confirm the exact York model family and default context before acting on a generic code description.
- Confirm filter condition, blower operation, and coil cleanliness before replacing any controls — start by ruling out whether verify incoming line voltage and current draw against the unit's nameplate rating with a c….
- Measure airflow-related readings that match the symptom, such as temperature split or static pressure, and check whether check for a failing compressor, blocked condenser coil, or restricted airflow forcing the….
- 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.
