Check for Power at the System Board  (120V)


High Voltage will be present during this test!

High voltage can seriously injure or kill.

ONLY experienced technicians should conduct these tests.


Begin Voltage Check

Use your Voltmeter to check Voltage at TB1 (Terminal Block 1) across the White and  Black Wires.  Use the screws on top of TB1 for the voltmeter probes.


Do you Read 108 to 132 VAC?   

YES         NO