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Troubleshooting the Pressure Switch in a Gas Furnace!
In This HVACR Training Video, We Diagnose a Gas Furnace Pressure Switch by Reading the Voltage Across the Switch and the Negative Water Column Pressure to see if the Pressure Switch is Open or Closed and Why the Error Code Exists. We use a Digital Multimeter and a Digital Dual Water Column Manometer for Troubleshooting.
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