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 5TDM5D07AC51 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 5TDM5D07AC51
| 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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