York Error Code Reference — All 12 Codes
Complete York error code cheat sheet. All 12 fault codes with plain-English explanations and direct links to fix guides.
Use this page when your York furnace, air conditioner, heat pump, or mini split is flashing a fault. Start with the exact code, then open the fix guide to diagnose airflow, ignition, sensor, pressure switch, board, or communication problems before you order parts or book a service call.
Tip: search the exact brand, model, and code together, for example "York error code 13" or "York pressure switch fault".
| Error Code | What It Means | Often a cheap fix? | Guide |
|---|---|---|---|
| York 1-Blink Error Code | Pressure Switch Stuck Closed Fix | — | Fix → |
| York 2-Blink Error Code | Pressure Switch Stuck Open Fix | — | Fix → |
| York Affinity Series Packaged Unit Error Codes: Complete Guide | York Affinity packaged unit error codes and fault diagnostics. Flash codes, communicating system faults, and technician-level troubleshooting. | — | Fix → |
| York Chiller Fault Codes | Complete Troubleshooting Guide | — | Fix → |
| York Furnace 6 Flashes Error Code | Pressure Switch Fault Fix | — | Fix → |
| York Furnace Error Codes | Complete Guide | — | Fix → |
| York Furnace Igniter Not Working | Causes & Fix | — | Fix → |
| York Rooftop Unit Error Codes: Technician Guide | Complete York RTU error code guide for Predator, Affinity, and ZF series. Flash codes, alphanumeric faults, and field fixes for commercial rooftop units. | — | Fix → |
| York TG9 Furnace Error Codes | Fault Code Diagnostic Guide | — | Fix → |
| York YCD Packaged Unit Error Codes | Fault Code Diagnostic Guide | — | Fix → |
| York YG2C Furnace Error Codes | Flash Code Diagnostic Guide | — | Fix → |
| York YSC Rooftop Unit Error Codes Guide | Complete York YSC series rooftop unit error codes. Covers all E-codes, P-codes, and flash codes with technician-level diagnostic steps. | — | Fix → |