Coolant temp problem

[james005]

I've noticed acouple of times while driving, my temp gauge would steadly go up till I turned my temperature on the EACT to 90 then it would go back to normal temp reading. Anyone know what would cause this to happen? I was starting to think my thermostat is starting to go bad. Does that sound right?

[fastblackmerc]

I've noticed acouple of times while driving, my temp gauge would steadly go up till I turned my temperature on the EACT to 90 then it would go back to normal temp reading. Anyone know what would cause this to happen? I was starting to think my thermostat is starting to go bad. Does that sound right?

No, the EATC has nothing to do with the engine cooling system.

[SC Cheesehead]

Sounds like you may have trapped air in the coolling system, try burping it.

[Mr. Man]

Sounds like you may have trapped air in the coolling system, try burping it.
What he ^^^^^ said would be the logical first step.

[RF Overlord]

Also check that the radiator fan is working.

Turning the heat on high acts like a secondary radiator and removes heat from the coolant.

[james005]

Okay, thanks guys. If this works that means I have an internal coolant leak then. Because she doesn't have a puddle under her. Guess I'm checking the oil for that too then. Thanks again.