What this code means
Trane AHR-SVX008A-EN LED indicator system-failure table for 5TDM5 air handlers identifies running indicator light out for 3 seconds then flashing three times as adhesion protection by electric heating.
Safe checks
- Confirm the thermostat is on, set correctly, and calling for heating or cooling.
- Check the air filter and visible return-air path for obvious airflow restrictions.
- Look around the outdoor unit for leaves, snow, ice, or other visible obstructions without opening the cabinet.
- Take photos of the thermostat, outdoor unit, nameplate, and any visible flash pattern before scheduling service.
First step
Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.
Frequently asked questions
What does Running 3s 3 flashes mean on a Trane 5TDM5D06AC41?
Trane AHR-SVX008A-EN LED indicator system-failure table for 5TDM5 air handlers identifies running indicator light out for 3 seconds then flashing three times as adhesion protection by electric heating.
What should I safely check before scheduling service?
Use only the visible, non-invasive checks listed on this page. Do not open equipment panels.
When should GreenFlow handle this code?
Call GreenFlow if the code repeats, the system is locked out, heating or cooling is not restored, there is ice buildup, electrical odor, unusual noise, or any issue involving pressure switches, sensors, wiring, refrigerant, reversing-valve operation, or warranty coverage.