Change thermostat

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  #1  
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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  #2  
Old 05-14-19, 04:33 PM
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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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