Question about Air Conditioners
You may want to shut the breaker off to your furnace or air handler, or if you have a packaged system turn it's breaker off. This will kill the low voltage to the stat possibly allowing it to reset. I would also try to reset it after you turn your breakers back on.
Posted on Dec 23, 2007
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Aug 07, 2011 | Honeywell Air Conditioners
Yes, you can replace with that...just make sure that you mark the wires BEFORE removing them...so you can place them on the same terminals on the new t-stat...
Here is a list of each common terminal and what their commonly used for. Also listed is what colors are commonly used. NEVER ASSUME these are what you have. Verify all your wires by following each to each piece of equipment. This will help you to be able to match your equipment with the terminal.
Here is the rest of the tip that I wrote...
Thermostat Wiring and Terminal Designations
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