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Hello, remove the batteries and fit them in *backwards... wait 5 minutes and reinstall them correctly, let me know what happens.
Thanks, ***** ***** case I need the brand and model number of the furnace or air handler.
Or you can tell me which color wires connect to the magic stat and onto which terminal numbers or letters and we do some tests.
If you get an identical thermostat and wire it identically that will be safe enough. if you get one of the other 30 thermostats on the market you can run into compatibility and wiring issues.