1. Check for voltage (12 volts DC) between the output contacts (AC1 & AC2 marked on the control board) ground (any green wire).
CAUTION: This test should only be done by an experienced person familiar with electricity.
1. Check for voltage (12 volts DC) between the output contacts (AC1 & AC2 marked on the control board) ground (any green wire).
CAUTION: This test should only be done by an experienced person familiar with electricity.