Question about Heating & Cooling
Go to the low voltage terminal board in your furnace. Follow the thermostat wires ti find it. Set your meter above 30 volt A/C. Hook one lead to one side of the transformer. Touch the other to the RED wire on the terminal strip. If you don't read 24 volts, switch terminals on the transformer and touch the red wire again. If OK then touch your lead to the YELLOW wire or the terminal marked Y on the terminal strip with the thermostat set to cool. you should have 24 volt now between the lead on the transformer and the one on the Y terminal. Go to the condensing unit outside and test the 2 18 gauge wires there. the 2 readings should be the same. If you have any trouble with anything, please write me back.
Posted on Apr 03, 2011
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Posted on Jan 02, 2017
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