Question about Heating & Cooling
The wire is a thermocouple wire sensor.
Look closely, (it is safe to touch).
It loooks like a bare copper wire. It is actually two wires (thermo "couple"). A tiny electrical charge will flow from one of the metals to the other when heated... that makes is a good way to measure heat (or coolness). Works just like a thermometer.
It needs to be placed in the return air duct or condenser so that the thermostat can be triggered when the coolness setting is reached.
Posted on Oct 01, 2009
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Posted on Jan 02, 2017
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