Earlier this year, we had an issue with one of the furnaces on our 2010 38TKSB3 not coming on. We got in touch with a mobile repair guy in Colorado Springs and he tried the temperature sensor first, but that didn't help. Playing around with things, he decided that the control board in the A/C unit needed to be replaced.
With that board being replaced, everything worked fine. When he replaced only the temperature sensor, the furnace would come on, but only if the thermostat was set up to about 94 degrees. Since we were still in cold weather there in Colorado Springs, we worked with that until he replaced the board.
Terry
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