Skip the auto shop - Our mechanics make house calls

Q: The cooling fan runs loud and fast on a cold start and the car overheats

asked by on

The radiator fan runs very loud and fast and the car is overheating..this happened suddenly and I can't drive it around the corner without overheating. It has about 180k miles a recent service and the coolant level is good and was changed about 1 year ago..connected Obd reader and there isn't any codes

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

From the description you have provided, your vehicle’s cooling system thermostat may be stuck closed. The cooling system thermostat is designed to quickly bring the engine up to operating temperature. If stuck closed, the result would be the engine overheating in a short time. The cooling fan on while the engine is cold could be normal if the A/C is on. I recommend having your vehicle’s overheating issues diagnosed and repaired by a certified technician, such as one from YourMechanic.

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!
  • Home
  • Questions
  • The cooling fan runs loud and fast on a cold start and the car overheats

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: My BMW 535xi when start at in the morning my car shake have to warm up around 5-10mins

Hi there. If your engine shakes for about 5 to 10 minutes upon your initial start of the day, it's not normal. In most cases, this is caused by either a faulty cold start injector, clogged or dirty fuel injectors...

Q: Overheating and heater not working

It sounds like you may have a faulty thermostat as well as a bad coolant temperature sensor. If the coolant is not getting to the heater core, then this would indicate a bad thermostat or a clogged heater core not...

Q: 535 I high idling and reads engine malfunction reduce speed but my car was not running I just started it

Hello, thank you for writing in. The vehicle starts to run tests on the vehicle's systems the second the key is inserted. By the time you start the car, any issues the computer has detected are designed to alarm you...

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...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.