Trane XR80 Blinking Red Light – Furnace Troubleshooting

If you have a Trane XR80 furnace, then you have one of the most reliable heating systems that bring you the best value. However, even this furnace is top of the line, it can runs into trouble too. This is why Trane included several error codes to assist you find a specified issue. Trane provides a quick diagnostic check in their furnace with a flashing light system which is either red or green.

Trane uses a red and green light flashing system to notify you when there is a specific problems that need attention. Unfortunately, in the trane xr80 manual red light blinking offers no explanation exactly what the blinking red light means.

Trane xr80 blinking red light is visible behind a small hole in the bottom front panel of the furnace.

This article will explain how to read the Trane xr80 blinking red light codes, interpret them, and understand what your problem might be.

Trane XR80 Furnace Error Codes

Trane xr80 red light will flash for the sequence, then off and then flash again. You should count how many times the Trane xr80 blinking red light and match them with the error code below. The flashes range from two flashes to eight.

These are some common Trane furnace error codes:

  • flashing slow: normal no call for heat
  • flashing fast: normal call for heat
  • continuous on: replace control
  • continuous off: check for power
  • 2 flashes: system lockout (no flame) or reversed polarity
  • 3 flashes: pressure switch problem
  • 4 flashes: thermal (limit) protection off
  • 5 flashes: flame sensed with gas valve off
  • flashing slow normal – no call for heat from thermostat
  • flashing fast normal – call for heat from thermostat
  • continuous on control board bad – needs replaced
  • continuous off check power
  • 2 flashes system lockout (retries or recycles exceeded)
  • 3 flashes vent pressure switch error
  • 4 flashes open high temperature limit device
  • 5 flashes flame sensed when no flame should be present
  • 6 flashes 115 volt ac power reversed or poor grounding
  • 7 flashes gas valve circuit error
  • 8 flashes low flame sense signal
  • flashing slow normal – no call for heat from thermostat
  • flashing fast normal – call for heat from thermostat
  • continuous on control board bad – needs replaced
  • continuous off check power
  • 2 flashes system lockout (retries or recycles exceeded)
  • 3 flashes vent pressure switch error
  • 4 flashes open high temperature limit device
  • 5 flashes flame sensed when no flame should be present
  • 6 flashes 115 volt ac power reversed or poor grounding
  • 7 flashes gas valve circuit error
  • 8 flashes low flame sense signal
  • 9 flashes check ignitor circuit

Another problem you are likely to face with your Trane xr80 furnace is lacking power to the thermostat. This problem happens when your display screen is either blank or lacking power. If this case happens you should check out your circuit breaker. Reseting the furnace may solved the problems.

If you cannot decode the Trane xr80 blinking red light, you should call HVAC technician near you to identify what the problem is. When it comes to repairing your Trane furnace, it’s best to rely on an HVAC professional. You should also consider investing in an Furnace maintenance plan as this will prevent more costly repairs in the future.

About Mas Broto

Have been in the heating and air conditioning (HVAC) industry for over 20 years. He is person that will grow and thrive to learn more about the HVAC industry throughout his career. Mas Broto is also a blogger, who's dedicated to bringing you the best knowledge to get ahead in the game of life.