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xl800
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  1. HVAC
    I have a Trane AC and heat system with a heat pump and a propane backup for the heat. The system came with a Trane non-programmable digital thermostat. I wanted to upgrade to the XL800 thermostat so I purchased 2 new TCONT800 units on Ebay. The wiring doesn't match up and it appears I bought a...
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