#### TESTING

When the air around the temperature sensor of the unit mounted inside the air cleaner housing reaches 100°F (38°C), the sensor should block the flow of vacuum to the air control valve vacuum motor. When the temperature around the temperature sensor is below 100°F (38°C), the sensor should allow vacuum to pass onto the air valve vacuum motor thus blocking off the air cleaner snorkel to under hood (unheated) air.

When the temperature around the sensor is above 118°F (48°C), the air control valve should be completely open to under hood air.

If the air cleaner fails to operate correctly, check for loose or broken vacuum hoses. If the hoses are not the cause, replace the vacuum motor in the air cleaner.