Modine Manufacturing HD Manual page 146

Call for Heat – Unit Does Nothing
The below troubleshooting steps refer to situations where the green light on the control
board is OFF and 24 VAC is NOT present between Sec & Com on board:
Step 1: Check for loose connections.
Step 2: Check incoming power (115 VAC).
Step 3: If incoming power is correct, check for 24 VAC at the secondary
of the transformer.
• If incoming voltage is correct and there is no voltage at the secondary, then
replace transformer.
• For more information on how to replace transformer, please visit
www.youtube.com/modineHVAC.
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Hot Dawg Troubleshooting Guide
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