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  1. I have three CCZ-T1 thermostats that control three heating/cooling zones (zone dampers) of a conventional gas furnace. Furnace has been checked-OK., but furnace is not turning on. Changed batteries in all three thermostats...One thermostat will not update to current date/time... goes to May 2003. Is there any way/shortcut to program or check them??? I can't seem to get access per Directions that came with them. Any help appreciated.
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