Kelton, Technician; did my winter tune-up on the furnace (9/21/18), I ask about the cleanliness of the burn area, he said its ok and it doesn't need cleaning. Every tech prior did a disassembly of the burn area and cleaned it; first bout of training. Then my thermostat back light failed to come on. Kelton sold me a new thermostat on 9/27/18 and when they checked the operation, they found a blown fuse down stream of where the power connection is for the thermostat. Not a word mentioned in the work done and the diagnosis. I called, but they are stone-walling me. They won't come back to finish address the undocumented work because there is something they are hiding. The thermostat won't trip the fuse. Kelton
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