Change thermostat


Old 05-14-19, 03:27 PM
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Change thermostat

I need to replace a thermostat. I know there is very little power in the system, but should I disconnect a wire from the transformer? I never thought it made any difference.
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Old 05-14-19, 04:33 PM
Join Date: Oct 2016
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Shut off power to the air handler.
Shorting the 24 V control circuit can damage transformers and blow fuses.
What type of equipment do you have?
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