York Heat Pump error codes
5 York heat pump codes and problems, each with ranked causes, safe homeowner checks and honest repair costs. Count the flashes or read the code on your control board, then find it below. Legends vary by board revision, so confirm against the label inside your unit's door.
| Code | What it means | Severity |
|---|---|---|
| Frozen and not defrosting | York heat pump iced up and not defrosting? Learn the causes (defrost board, sensor, reversing valve, low charge), safe checks, and repair costs. | Call a pro |
| Ice on outdoor unit | Why ice builds on a York heat pump outdoor unit: normal frost, roof runoff, airflow, low charge or defrost faults. Safe checks, pro fixes and repair costs. | Call a pro |
| Not cooling | York heat pump not cooling? Learn the likely causes (filter, thermostat, refrigerant, capacitor, reversing valve), safe checks, and repair costs. | Call a pro |
| Not heating | York heat pump not heating? Common causes like thermostat setup, defrost, low refrigerant and failed reversing valve, safe checks, and repair costs. | Call a pro |
| Stuck in defrost mode | York heat pump stuck in defrost? Learn the causes (sensor, board, reversing valve, relay), safe checks, technician fixes, and repair costs. | Call a pro |
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