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Contactors Explained and Tested: Wiring, Troubleshooting, Problems, Ratings, and Visual Power Up!
How HVAC Contactor Relays Work, Troubleshooting Procedure, 24v, 120v, 240v Wiring, Problems signs that they are Bad, Reading coil resistance, fla ratings, and visual checks. I will power one so that you can see the plunger go down.
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