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Question by  Kemaeli (71)

What does the brown wire do on an HVAC thermostat?

 
+6

Answer by  salsafoodie (3146)

The brown wire is a temperature gauge that will help the thermostat with the correct temperature so it will not get too cold or hot.

 
+4

Answer by  JSmith0330 (616)

The brown wire on the thermostat is the temperature gauge,this helps the thermostat to keep correct temperature so it doesn't get to cold or to hot.

 
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