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Cold Override Temperature Switch

To test temperature switch with engine cold: Turn ignition switch on. If CEC solenoid plunger does not energize, or, if it energizes and retracts after 25 seconds, remove green and white wire at temperature switch and ground it. This will activate solenoid plunger, indicating a defective temperature switch. To test temperature switch with engine warm: Allow engine to cool. Then, with wires connected and unit grounded, solenoid should energize and remain energized. If it does not, switch is defective.

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