Operation CHARM: Car repair manuals for everyone.

Engine Runs Cold


Engine Runs Cold

Before conducting any cooling system diagnosis, see description and operation, Engine Cooling.

1. Check operation of fan clutch. Does it work?
NO - Replace
YES - Continue.

2. Is thermostat correct type and operating?
NO - Replace
YES - Continue.

3. Are the air conditioning fans operating continuously?
YES - Check circuit.
NO - Continue.

4. Is temperature sender and gauge giving accurate readings?
Substitute parts and compare readings. If problem is not diagnosed repeat tests, starting at 1.