I put in a new thermostat the old one was removed without labeling the wires
Making the wiring connections for a thermostat when the old thermostat was removed without labeling the wires
Electrical Question from Diane
Electrical Question: I put in a new thermostat. The old one was removed without labeling the wires. A furnace and air conditioner are both run on it. Thermostat wires consist of blue, white, red and green. Furnace wires are White in white, blue in yellow, green in green Red in Red. Air conditioner consist of two wires. Red wire is with blue wire from furnace in yellow spot. White wire is in a “c” spot. There is a RC spot on thermostat that has a jumper wire to the red spot. Any suggestions. On the thermostat I have the blue wire in the blue spot and the white with white spot and green with green and red with red. The air only works when in the heat mode of the thermostat. If you need pictures I can try to get them tomorrow.
This electrical question came from: Diane, from Goodells, Michigan
See more about Home Wiring for Michigan
Dave The Electrician’s Reply:
Thanks for your electrical question Diane
Wiring a Thermostat
Making the wiring connections for a Thermostat
- There are specific wiring assignments for thermostats that are common for most heating and cooling units and this will need to be identified for your specific thermostat and home heating and cooling system as described below.
More about Wiring a Thermostat
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Consult your Local Building Department about Permits and Inspections for all Electric Wiring Projects.
The Safest Way to Test Electrical Devices and Identify Electric Wiring!The Non-Contact Electrical Tester
This is a testing tool that I have had in my personal electrical tool pouch for years, and is the first test tool I grab to help identify electrical wiring. It is a Non-contact tester, [amazon.com], I use for the detection of Standard Voltage in Cables, Cords, Circuit Breakers, Lighting Fixtures, Switches, Outlets and Wires. Simply insert the end of the tester into an outlet, lamp socket, or hold the end of the tester against the wire you wish to test. Very handy and easy to use.
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