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Industrial Error Code Fixes

Trane Error Code Reference — All 44 Codes

Complete Trane error code cheat sheet. All 44 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 Guide
Best Furnace Igniter Replacement Universal and Brand-Specific Picks Fix →
Trane 1 Flash Error Code Causes & Fix Fix →
Trane 2 Flashes Error Code Causes & Fix Fix →
Trane 3 Flash Pressure Switch Fault Detailed Diagnosis Guide Fix →
Trane 3 Flashes Error Code Pressure Switch Fault Fix Fix →
Trane 4 Flashes Error Code Open High Limit Fix Fix →
Trane 4TCC4 Mini Split Error Codes Causes & Fix Fix →
Trane 5 Flashes Error Code Causes & Fix Fix →
Trane 6 Flashes Error Code Causes & Fix Fix →
Trane 7 Flashes Error Code Gas Valve Circuit Fault Fix Fix →
Trane 8 Flashes Error Code Causes & Fix Fix →
Trane 9 Flashes Error Code Causes & Fix Fix →
Trane AC E2 Error Code Sensor and Communication Fault 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 ComfortR ER Error Code Causes & Fix Fix →
Trane Error Code 126 Ignition Lockout Fix Fix →
Trane Furnace Error Codes Complete Flash Code Guide Fix →
Trane Heat Pump 1 Flash Error Code Causes & Fix Fix →
Trane Heat Pump E2 Error Code Outdoor Coil Sensor Fault 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 Rooftop Unit Fault 77 High Pressure Cutout 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 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 Error Codes Flash Code Quick Reference 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 Error Code 79: Communicating Thermostat Fault Fix Trane XV20i error code 79 means a communicating thermostat fault. Learn the causes, how to diagnose ComfortLink II wiring issues, and how to fix it fast. Fix →
Trane XV20i Heat Pump Error Codes Common Faults & Fixes Fix →
Trane XV20i/XV18 Variable Speed Heat Pump Error Codes Trane XV20i and XV18 variable speed heat pump error codes and fault diagnostics. ComfortLink II fault codes, causes, and technician fixes. Fix →
Trane XV80 Furnace Error Codes Flash Code Diagnostic Guide Fix →
Trane YSC Packaged Rooftop Error Codes Fault Code Diagnostic Guide Fix →
View all Trane guides →