What was the blue wire connected to on the original thermostat? Take a look at the terminal block in the furnace/air handler and see if the blue wire is connected to anything.
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Smbearkat, I'm jumping in to ensure you're all good here. Should you still need our help, have you tried checking on your HVAC's control board just like the suggestion above?
We haven't heard from you in a while so we'll be locking this thread if there is no update within the day. If you have any new issues, updates or just a discussion topic, feel free to start a new thread in the Community.
