Skip the auto shop - Our mechanics make house calls

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

asked by on

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.

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.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Hi, I have an intermittent fault, when I drop down the gears, occasionally, the acceleration becomes sluggish, and car vibrates.

A common problem with the 1.9L diesel motor is injector timing. Injector timing is critical and can have many varied symptoms. At 102,000 miles, I have to wonder if the timing belt has been done. The timing belt is what...

Q: 1999 Nissan Altima won't stay running. I changed the thermostat.

First of all, it isn't possible to tell you exactly what is wrong with your car without direct testing, in other words, diagnosing it. If the thermostat made the car run at the proper temperature, then that is not likely...

Q: My temperature gauge reads cold - 2004 Chrysler Sebring

Hello there. A few common faults will cause your 2004 Chrysler Sebring to to stay at C on the temperature gauge. The most common are a faulty coolant temperature sensor, failing temperature gauge, or wiring harness fault. If the engine...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.