Q: Temp. Gauge rises when I'm stopped or idling and when I run the AC but not when I'm moving.

asked by on July 09, 2016

Recently I have noticed my temp gauge rise when I am stopped or idling and also when I run the AC. However, it begins to fall back down once I start to drive. At first I thought it was the fan clutch which I recently installed 2 days ago. Unfortunately, the problem is still there. There are no leaks from neither the water pump nor the radiator and my radiator and reservoir and completely filled. Could this be the work of a thermostat stuck closed or what ? Please let me know.

My car has 180000 miles.
My car has an automatic transmission.

If you are getting overheating only at lower engine speeds with no obvious reasons, then you will need to check if there is good flow through the radiator using a laser temperature sensor. By doing this you will be able to see if there is any blockage in the radiator.

If the temperature is good in the radiator then you should check the operation of the water pump. If it is not pumping properly it should due to worn pump blades. Replace the water pump and recheck the system as necessary.

I’d suggest getting some help from a certified mechanic who can run these checks and diagnose your overheating issue firsthand. Good luck.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

All lights work except brake lights and high cent light replaced the switch still not working truck is a 1999 sliverado 1500 5.3

The problem sounds like the stop lamp fuse in the engine compartment fuse box 20 amp is blown. Check this fuse and also make sure it has power to it. If bad try replacing it and go from there. If...

Replacing driver's seat

Hi there, thanks for writing in. You can use the same bucket seat out of any GM truck whether it is a GMC or Chevrolet from the years of late 1989 all of the way up to 1998. This can...

Flex pipe

As I said before it can be replaced without replacing the entire converter assembly. If you google search the exhaust on your car you will see the flex pipe can be purchased separately. All you need to do is get...

Related articles

A Buyer’s Guide to the 2012 Chevrolet Captiva Sport
The The 2012 Chevrolet Captiva Sport is a brand new vehicle and is an eco-conscious crossover SUV for the environmentally friend consumer. It comes standard with many features, but also has many available options so it can suit any buyer’s...
How to Buy a Classic Chevy
For experienced car collectors and rookies alike, owning a classic Chevy is a rite of passage. There are multiple decades and styles in which Chevrolet made popular cars. Many of these cars then had a devout following in the years...
Understanding Chevrolet Oil-Life Monitor (OLM) System and Lights
Car symbols, or dashboard lights, are a car service reminder. The Chevrolet Oil Light Monitor system indicates when and what service your car needs.