Q: Car overheating when idling or in stop-and-go traffic

asked by on February 02, 2016

My car runs within a normal temperature range and has no issues until I turn on the AC, or if idling for an extended time. Then it starts to overheat. In addition, while driving on the freeway, the car keeps cool, but in stop-and-go, it heats up. I replaced the radiator, radiator cap, water pump, and thermostat, and it still overheats.

Car is overheating Inspection $79.99 - $89.99 Get a Quote

It sounds to me like the cooling fans aren’t coming on. I would suggest having a certified mechanic test for power at the fans while the AC is on, and verify the fan switch, relays and wiring are all working appropriately. All this can be achieved by running an overheating inspection.

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

What others are asking

Code c0040 ABS

Hi there. Typically the Chevrolet unique code of C0040 is an indicator of an ABS sensor or module problem. You might want to review this video on how many mechanics diagnose the source of this issue and resolve it with...

I have a. 2015 Chrysler 200 and it wont go past 32 mph what could be wrong?

Hi Dread. Thanks for sending in your question. Usually, this type of issue occurs when the "limp mode" is engaged. This can happen when the ECU detects a mechanical or electrical problem with the transmission or other drive-line systems. It's...

Trunk latch not working.

The small push button for the trunk may be defective and will cause the trunk to open by itself if the key is near enough to cause the passive trunk to release and open the trunk. The defective button is...

My car stalled while driving and will not start.

Hi there. Do any warning lights come on when turning the key? If not, then the battery is discharged. If they do, then there are other possible causes to your no start condition that require proper inspections to diagnose. A...

Why does my oxygen sensor heater stay in not ready mode on my 2002 Cadillac Escalade

Hello. If you have performed the necessary driver cycles and have not lost battery voltage or reset the computer at any time then you either have a problem with the heater circuit of the sensor or the computer is failing....

How to replace a camshaft sensor? Shows sensor "A" on diagnostic check 2002 Saturn SL1

Hello - there is no physical camshaft position sensor on this engine. This function is handled by the coil and ignition module. The error is likely a wiring problem, either with the plug wires, or the physical wiring to the...

AC blower going out?

The clogged line caused the evaporator case to flood out. The problem is the blower motor and the blower motor control resistor may of got flooded out with the water and caused them to short out. If you can get...

Vibration when changing gears.

Vibration between shifts in an automatic or manual are pretty similar and are usually caused by loose motor or transmission mounts, but could be mimicked by suspension components. Have a mechanic from YourMechanic inspect your vehicle for any looseness in...

I have a 2006/7 Toyota Camry and it has a Japanese Multi-information display. Is there a way to get it to be changed to English?

Yes, you can change the language by following the same steps in the display menu when choosing languages. You may be able to find a step-by-step guide in your owners manual. The menu items usually come up in the same...

Related articles

How to Prevent and Handle an Overheated Engine
An overheated engine can seize the motor completely. Learn how to prevent your engine from getting too hot and causing damage.
Symptoms of a Bad or Failing Carburetor
Common signs include reduced engine performance, black smoke coming from the exhaust, backfiring, overheating, or hard starting.
A Buyer’s Guide to the 2012 Chrysler Town & Country
While While the Chrysler Town & Country has been in production for over half a century, the 2012 Chrysler Town & Country is anything but old-fashioned. The model got a huge overhaul in 2011 and saw a few new upgrades...