Skip the auto shop - Our mechanics make house calls

Q: Car overheats after 25 minutes

asked by on

My car starts to overheat when sitting for more than 25 minutes. I may need to replace the thermostat.

Hello! A stuck closed thermostat will cause a vehicle to overheat in about that time. A coolant leak, bad fan operation, or a leaking head gasket will produce similar overheating conditions. I suggest having the coolant system inspected by a certified technician, such as one from YourMechanic. When inspecting the system have them check for leaks, fan operation, thermostat operation and also test the head gasket.

It is likely that the thermostat is causing the car to overheat. If this is found to be the case, I would recommend having your thermostat replaced. However, it is also likely that the fans are not functioning properly since the fans are designed to turn on after about 25 minutes of running to keep the vehicle from overheating. If the fans don’t turn on the vehicle will overheat.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: I have a 1988 dodge dynasty. The timing jumped and I've been told the engine is not longer good. The car cranks but doesn't start

Hi there. I think this is an example of somebody telling you something that does not comprehend the basics of ignition timing or the timing chain / belt. Ignition timing is a collaboration between the ignition system and the valves...

Q: Water temperature gauge fluctuates even after replacing the thermostat could it be the water pump

Hello, thank you for asking about your 2003 Honda Element. This can be many different things aside from the thermostat, such as a failing water pump, a failing coolant fan relay, a clogged radiator, or even potentially a blown head...

Q: Truck is slow and sluggish to start and will only run a few minutes before shutting off and hisses when it does

Hello there, there is a variety of faults that could cause your 1996 Dodge Ram to shut off after warming up. If the belt jumped off than there is likely other faults that caused this. This could be from many...

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...
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...