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HVACR General Purpose Switching Relays, How it Works, Troubleshooting!

In this HVAC Training Video, I show how the DPDT General Purpose Switching Relay Works. I go over the Troubleshooting of the relay with the multimeter and the voltage paths across the contact and coil. DPDT is Double Pole Double Throw. I show the resistance readings of relays with a 24v, 120v, and 240v coil. This relay is also used on Fan Center Controls and I show how they work as well!

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