York Error Code Reference — All 21 Codes
Complete York error code cheat sheet. All 21 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 | Guide |
|---|---|---|
| York 2 Flashes Error Code | Causes & Fix | Fix → |
| York 3 Flashes Error Code | Causes & Fix | Fix → |
| York 4 Flashes Error Code | Open Limit Device Fix | Fix → |
| York 5 Flashes Error Code | Causes & Fix | Fix → |
| York 7 Flashes Error Code | Ignition Lockout Fix | Fix → |
| York 8 Flashes Error Code | Causes & 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 E4 Error Code | Ignition Failure | Fix → |
| York Furnace Error Code E2 | Causes & Fix | Fix → |
| York Furnace Error Code E2: Pressure Switch Fault Causes and Fix | York furnace error code E2 means a pressure switch fault. Diagnose blocked drains, bad inducer, or failed switch on York, Coleman, and Luxaire furnaces. | Fix → |
| York Furnace Error Code E3 | Causes & Fix | Fix → |
| York Furnace Error Code E5 | High Limit Tripped | Fix → |
| York Furnace Error Codes | Complete Guide | Fix → |
| York Mini Split Error Code E1 | 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 → |