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STEP 3
If your cooler is not working.
Are your cooling wires identified, labeled, and connected correctly?
RC or R and Y
There is no standard color code. Some of the wires may have the same color as the letter like R or RC is often red and Y is often yellow). The labels on the wires should be the same letters as where they were connected on the old thermostat.
If you cannot determine the letters from the old thermostat go to the HVAC site and try to identify the wires that go to the thermostat location as they are usually labeled. Be sure the power to your HVAC system is shut off.
If you cannot accurately identify the wires letters, do not guess, call your local HVAC service dealer.
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