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Inspection of HVAC Control Module and Its Circuit: Notes

HVAC control module and its circuits can be checked by measuring terminal voltages of HVAC control module connector.

NOTE: If you connect a voltmeter or ohmmeter directly to the HVAC control module terminals by removing the HVAC control module connectors, you can damage the HVAC control module.

Never connect a voltmeter or an ohmmeter directly to any terminal of the HVAC control module by disconnecting the HVAC control module connectors.

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