Skip the auto shop - Our mechanics make house calls

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

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.

A: If you are getting overheating only at lowe...

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?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
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・Save up to 30%

Get a quote

What others are asking

Q: reduced power and a question with the throttle body.

You got a loss of power due to a fault with the system closing the throttle as a built in safety factor. The reduced power indicator is telling you that it went in to a failure mode and caused the...

Q: Overheating car test

Hello, thanks for writing in about your 2005 Chevrolet Monte Carlo. Leave all the spark plugs removed and disable the ignition and fuel pump. Fill the radiator and pressurize the system to 15 psi if you can and see...

Q: The power locks are not working on three of the doors

As unlikely as it may be, you could have three failed door motors; it has happened to me in the past. However, fuses, relays, a master switch, or the BCM could also be at fault. Check all fuses/relays and replace...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...