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My Trane XR90 is flashing 4 blinks but all 4 temp sensors test as closed with my multi meter. What else can it be?

Post created: 2016-12-12 Type of Equipment: Furnace Views: 45

My Trane XR90 is flashing 4 blinks but all 4 temp sensors test as closed with my multi meter. What else can it be? I also for good measure cleaned the flame sensor. Cycled the power on the unit and put new batteries in the thermostat.


On 2016-12-12 wrote:

My Mistake all 3 temp sensors


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