Skip the auto shop - Our mechanics make house calls

Q: Temperature goes into the red zone during slow driving or idling

asked by on

Hello. The temperature gauge in my car is not working correctly. It goes into the red zone. It happened when I had the water pump and timing belt replaced. After installing new parts, on my way home, the gauge stopped working normally. I took it to the dealership again and they said the issue is with the air pockets in the system so I got the system bled. It didn't help however. During idling or slow driving, the temperature gauge goes into the red zone. But, it works better while the AC is running. Do you have any suggestions how to fix this? Thanks.

A: Hi there. If this occurred right after the ...

Hi there. If this occurred right after the work was performed then it is possible that there is air still stuck in the cooling system, but from what you are explaining with the AC, it sounds more like a cooling fan problem. If the radiator cooling fan is not coming on then that will cause this. It may be a bad fuse or relay. I typically start by making sure that the ranks coming on when the engine warms up. If not I would diagnose it from there.

If you need to have your temperature gauge issue diagnosed, consider YourMechanic, as a certified mechanic can come to your home or office to take a look at it.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Faulty water pump causing car to overheat

If coolant is not circulating, even with the thermostat removed, the problem may be with the water pump. It could also be a clogged radiator, but is not likely. If the coolant is circulating, the problem could be with the...

Q: Gauges going crazy

This may be related to a short, a faulty instrument cluster or a faulty instrument voltage regulator. The instrument voltage regulator regulates the voltage supplied to the various gauges in your vehicle’s dash. When this is not working properly, this...

Q: How many ignition coils do I need for a 2006 Lincoln zephyr?

Your vehicle has a 3.0 liter engine and has a coil per cylinder. You have a 6 cylinder engine and have 6 coils. You do not need to replace the engine computer.

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...