Trane Error Code and Repair Guides - 48 Guides
Trane HVAC troubleshooting hub with 48 guides for fault codes, alarms, symptoms, parts checks, and repair decisions.
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".
Start With These Trane Guides
Trane ComfortLink II Error Codes — Common Faults and Fixes Guide to Trane ComfortLink II communicating system error codes, what each fault means, and how to diagnose and fix the most common problems. Trane Heat Pump Error Codes - Complete Troubleshooting Guide Trane heat pump error codes explained for communicating, variable-speed, XV20i, XL20i, and conventional systems. Trane 1 Flash Error Code — Causes & Fix What Trane 1 flash means on a furnace LED, why it signals normal operation or lockout depending on model, and how to respond. Trane Chiller Fault Codes — Complete Troubleshooting Guide Trane chiller fault codes for CGAM, CVHE, RTHD, and Tracer CH530 series. What each alarm means and how to fix it. Trane VRF System Error Codes Guide Trane VRF codes identify communication, EEV, thermistor, pressure, compressor, drain, and outdoor-board faults. Trane XR90 Furnace Error Codes — Fault Code Diagnostic Guide Trane XR90 Furnace Error Codes - Fault Code Diagnostic Guide: likely causes, checks, and repair decisions before replacing parts.
Trane FAQ
Where should I start with Trane error codes?
Start with the exact Trane model and displayed code or alarm, then open the closest guide on this page. Match the symptom, recent service history, and any secondary codes before resetting the equipment or ordering parts.
Do Trane fault codes always mean a bad control board?
No. Many Trane codes point to airflow, water flow, sensors, wiring, power quality, filters, switches, or operating conditions. Check the simple causes in the guide before replacing an expensive board.
When should I stop troubleshooting a Trane fault myself?
Trane HVAC equipment can hide unsafe ignition, refrigerant, high-voltage, or combustion problems behind a simple blinking code. Stop and use the repair checklist or compare service options when the guide points to gas, refrigerant, line voltage, sealed-system work, food-safety temperatures, or repeated faults after a reset.
| Error Code | What It Means | Guide |
|---|---|---|
| Trane ComfortLink II Error Codes | Common Faults and Fixes | Fix → |
| Trane Heat Pump Error Codes | Complete Troubleshooting Guide | Fix → |
| Trane 1 Flash Error Code | Causes & Fix | Fix → |
| Trane Chiller Fault Codes | Complete Troubleshooting Guide | Fix → |
| Trane VRF System Error Codes Guide | Trane VRF codes identify communication, EEV, thermistor, pressure, compressor, drain, and outdoor-board faults. | Fix → |
| Trane XR90 Furnace Error Codes | Fault Code Diagnostic Guide | Fix → |
| Trane Furnace 2 Flashes Pressure Switch Code | Trane furnace 2-flash guide for stuck-closed pressure switches, manometer testing, inducer checks, condensate problems, and code 3 differences. | Fix → |
| Trane Error Code 126 | Ignition Lockout Fix | Fix → |
| Trane TAM Air Handler Error Codes | Complete Guide | Fix → |
| Trane XL16i Heat Pump Error Codes | Trane XL16i heat-pump guide for pressure trips, defrost faults, compressor protection, fan issues, thermistors, and ComfortLink alerts. | Fix → |
| Trane Precedent Rooftop Unit Error Codes: Complete Guide | Use this Trane Precedent Rooftop Unit Error Codes reference to match the code with likely causes, service checks, and repair decisions. | 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 Tracer BAS Fault Codes | Complete Guide | Fix → |
| Trane XL20i Variable Speed Error Codes | Complete Guide | Fix → |
| Trane XR15 Heat Pump Error Codes | Complete Guide | Fix → |
| Trane XR95 Furnace Error Codes | Complete Guide | Fix → |
| Trane XV20i Heat Pump Error Codes | Common Faults & Fixes | Fix → |
| Trane 2 Flashes Error Code | Causes & Fix | Fix → |
| Trane 3 Flashes Error Code | Pressure Switch Fault Fix | Fix → |
| Trane 3 Flashes Pressure Switch Fault | Trane 3-flash guide for pressure switch faults, inducer checks, hose tracing, condensate drains, blocked vents, and differential pressure testing. | 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 ComfortLink II Thermostat Fault Codes | Trane ComfortLink II guide for communicating thermostat faults, code 79, code 80, code 81, control boards, wiring, and repair decisions. | Fix → |
| Trane ComfortR ER Error Code | Causes & Fix | Fix → |
| Trane Furnace Error Codes | Complete Flash Code Guide | Fix → |
| Trane Heat Pump 1 Flash Error Code | Trane heat-pump 1-flash guide for lockout resets, outdoor fan checks, defrost faults, pressure trips, coil icing, and service decisions. | Fix → |
| Trane Heat Pump E2 Error Code | Outdoor Coil Sensor Fault | Fix → |
| Trane Rooftop Unit Fault 77 | High Pressure Cutout | Fix → |
| Trane S8X1 Furnace Error Codes | Flash Code Diagnostic Guide | Fix → |
| Trane XE80 Furnace Error Codes | Fault Code Guide | Fix → |
| Trane XR13 Air Conditioner Error Codes | Trane XR13 guide for LED flash faults, high/low pressure trips, compressor protection, thermistors, charge loss, and anti-short-cycle delay. | Fix → |
| Trane XR14 Heat Pump Error Codes | Trane XR14 heat-pump guide for LED flash codes, pressure-switch trips, compressor protection, defrost faults, sensors, and low voltage. | Fix → |
| Trane XR80 Error Codes | Flash Code Quick Reference | 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/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 | Trane YSC rooftop guide for ReliaTel faults, HP/LP lockouts, freeze protection, fan circuits, liquid-line sensors, and return-air sensors. | Fix → |
| Best Furnace Igniter Replacement: Universal and Brand-Specific Picks | Choose a furnace igniter replacement by matching style, voltage, bracket, and brand fit before ordering a universal or OEM part. | Fix → |
| Furnace Blinking 3 Times | Cross-Brand Comparison Guide | Fix → |
| How to Reset a Furnace After Lockout | Per-Brand Reset Procedures | Fix → |