Trane Error Code Reference — All 33 Codes
Complete Trane error code cheat sheet. All 33 fault codes with plain-English explanations and direct links to fix guides.
Use this page when your Trane 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 "Trane error code 13" or "Trane pressure switch fault".
| Error Code | What It Means | Often a cheap fix? | Guide |
|---|---|---|---|
| Best Furnace Igniter Replacement | Universal and Brand-Specific Picks | — | Fix → |
| Trane / American Standard 2-Blink Error Code | External Lockout Fix | — | Fix → |
| Trane / American Standard 4-Blink Error Code | Limit Circuit Trip Fix | — | Fix → |
| Trane 3-Blink Error Code | Pressure Switch Fault Fix | — | Fix → |
| Trane 4TCC4 Mini Split Error Codes | Causes & Fix | — | Fix → |
| Trane CenTraVac Chiller Fault Codes | Common Faults Guide | — | Fix → |
| Trane Chiller Fault Codes | Complete Troubleshooting Guide | — | Fix → |
| Trane ComfortLink II Communicating Thermostat Fault Codes | What They Mean and How to Fix Them | — | Fix → |
| Trane ComfortLink II Error Codes | Common Faults and Fixes | — | Fix → |
| Trane Furnace Error Codes | Complete Flash Code Guide | — | Fix → |
| Trane Furnace Igniter Not Working | Causes & Fix | — | Fix → |
| Trane Precedent Rooftop Unit Error Codes: Complete Guide | Trane Precedent RTU error codes and fault diagnostics for commercial technicians. Flash codes, sensor faults, and step-by-step fixes. | — | Fix → |
| Trane Rooftop Unit Error Codes: Common Faults Guide | Complete guide to Trane RTU fault codes for Precedent, YCD, and YCC series units. Flash codes, alphanumeric faults, and technician fixes. | — | Fix → |
| Trane S8X1 Furnace Error Codes | Flash Code Diagnostic Guide | — | Fix → |
| Trane TAM Air Handler Error Codes | Complete Guide | — | Fix → |
| Trane Tracer BAS Fault Codes | Complete Guide | — | Fix → |
| Trane Voyager RTU Error Code 31 | Fix | — | Fix → |
| Trane VRF System Error Codes Guide | Complete guide to Trane VRF error codes. Covers all fault codes for Trane VRF multi-split systems with diagnostic steps and technician fixes. | — | Fix → |
| Trane XE80 Furnace Error Codes | Fault Code Guide | — | Fix → |
| Trane XL16i Error Codes | Heat Pump Fault Code Diagnostic Guide | — | Fix → |
| Trane XL20i Variable Speed Error Codes | Complete Guide | — | Fix → |
| Trane XR13 Air Conditioner Error Codes | Fault Code Diagnostic Guide | — | Fix → |
| Trane XR14 Heat Pump Error Codes | Fault Code Diagnostic Guide | — | Fix → |
| Trane XR15 Heat Pump Error Codes | Complete Guide | — | Fix → |
| Trane XR80 Blinking Yellow Light Codes | Causes & Fix | — | Fix → |
| Trane XR80 Blinking Yellow Light Codes: Full Flash-Code Fix Guide | Trane XR80 yellow LED blink patterns decoded - what each 1 through 9 flash sequence means, common causes, and the fix steps. Quick-reference table for HVAC technicians and homeowners. | — | Fix → |
| Trane XR90 Furnace Error Codes | Fault Code Diagnostic Guide | — | Fix → |
| Trane XR95 Furnace Error Codes | Complete Guide | — | Fix → |
| Trane XV20i Error Code 79 | Causes & Fix | — | Fix → |
| Trane XV20i Heat Pump Error Codes | Common Faults & Fixes | — | Fix → |
| Trane XV20i/XV18 Fault 126 | Low Pressure Cutout Fix | — | Fix → |
| Trane XV80 Furnace Error Codes | Flash Code Diagnostic Guide | — | Fix → |
| Trane YSC Packaged Rooftop Error Codes | Fault Code Diagnostic Guide | — | Fix → |