Why trane furnace blinking red light

If you see a blinking red light on a Trane furnace, it typically indicates that the furnace is experiencing a malfunction or error. The exact meaning of the light varies depending on the speed of the blinking and the model of the furnace, but some common causes include a dirty flame sensor, a problem with the gas valve or rollout switch, overheating, or a call for heat from the thermostat.