Safe visible checks
- Thermostat display and settings
- Filter condition and return-air path
- Visible outdoor-unit obstruction
- Photos of the code, unit, and nameplate
Product troubleshooting
Trane 5TDM5B04AC31 troubleshooting and error codes
Use this table to identify what the visible code may mean and what information to share when scheduling service. Keep checks simple and visible; do not open electrical, refrigerant, gas, or sealed equipment compartments.
Error-code table
Search codes for 5TDM5B04AC31
| Code | Meaning | System area | Safe first step | Action |
|---|---|---|---|---|
| Refrigerant indicator 1 flash | Indoor unit refrigerant leakage protection | Refrigerant leakage protection | Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service. | View details |
| Refrigerant indicator 2 flashes | Refrigerant sensor error | Refrigerant sensor | Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service. | View details |
| Refrigerant indicator off | Refrigerant sensor communication error | Refrigerant sensor communication | Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service. | View details |
| Communication indicator steady | Communication error | Indoor communication | Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service. | View details |
| Running 3s 1 flash | Indoor/outdoor communication or jumper cap failure | Indoor and outdoor communication | Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service. | View details |
| Running 3s 2 flashes | Indoor fan failure | Indoor fan | Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service. | View details |
| Running 3s 3 flashes | Electric heat adhesion protection | Electric heat protection | Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service. | View details |
| Running 6s 1 flash | Indoor ambient temperature sensor error | Indoor ambient sensor | Document the flash pattern, check thermostat, filter, and visible outdoor-unit obstruction status, and schedule service if the condition remains. | View details |
| Running 6s 2 flashes | Indoor pipe temperature sensor error | Indoor pipe sensor | Document the flash pattern, check thermostat, filter, and visible outdoor-unit obstruction status, and schedule service if the condition remains. | View details |
| Running 6s 3 flashes | Indoor air outlet temperature sensor error | Indoor outlet air sensor | Document the flash pattern, check thermostat, filter, and visible outdoor-unit obstruction status, and schedule service if the condition remains. | View details |
| Running 6s 4 flashes | Evaporator inlet pipe temperature sensor error | Evaporator inlet sensor | Document the flash pattern, check thermostat, filter, and visible outdoor-unit obstruction status, and schedule service if the condition remains. | View details |
| Running 6s 5 flashes | Evaporator outlet pipe temperature sensor error | Evaporator outlet sensor | Document the flash pattern, check thermostat, filter, and visible outdoor-unit obstruction status, and schedule service if the condition remains. | View details |
No matching error codes found.
Safety note
What is safe to check before service
These pages are meant to help document the issue, not replace diagnosis. GreenFlow should handle pressure-switch, electrical, refrigerant, lockout, recurring, and warranty-related conditions.
Stop and call
- Repeated lockouts or recurring faults
- Pressure-switch or sensor faults
- Electrical odor, unusual noise, or ice buildup
- Any sealed cabinet, refrigerant, gas, or warranty issue
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Our Happy Customers
Anna G.
They quickly identified the issue with the heating system and fixed it efficiently. He explained everything clearly and made sure I understood what was going on. Very professional and reliable, extremely satisfied with the service.
Murali S.
HVAC technician was punctual, followed up well, completed quick repairs, ensured the issue was resolved, and provided helpful recommendations.
Ray
Just had a service call because my tankless water heater stopped working with E110 code. Andrey located the root cause real quick and fixed the issue within half an hour, also gave reasonable recommendations for further maintenance.
Anna F.
They showed up within an hour of me making the call on a Sunday. They fixed our system and taught us how to replace the fuse in the future. We would definitely call again.