Skip the auto shop - Our mechanics make house calls

Q: Thermostat stuck

asked by on

My car gets hot, and the thermostat is stuck.

A stuck closed thermostat will cause a reduction of coolant getting into the radiator so heat can be transferred out of the cooling system. The thermostat will need to be replaced if it is indeed stuck closed and the cooling system should be pressure tested to ensure the system has not developed leaks due to the over stress caused by a stuck closed thermostat and overheating.

Note: Never open the check or open the cooling system with the engine hot or the system pressurized as serious injury can occur.

You may want to enlist the help of a mechanic, such as one from YourMechanic, who will have the equipment and training to diagnose the cooling system issue, identify why your car is overheating, repair the problem, and properly fill and bleed the cooling system so it will perform in its optimum range.

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
  1. Home
  2. Questions
  3. Thermostat stuck

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: temperature gage going from 4 to 5 natches ,but car running ok

Hello. It is common for the temperature gauge to climb as the engine is warming up. It should sit at about the half way point and remain there as the engine runs. If it is fluctuating then you either have...

Q: Engine chirp chirp chrip

Most likely the noise is coming from the drive belt. You can try to spray some wd40 on the belt and see if the noise goes away since the belt may be dried out. If the noise does not go...

Q: Dashboard draining battery

First, let's determine if the engine is cranking. If the engine is not cranking it could be any one of these issues: weak or defective battery, bad battery cables, ignition switch, starter motor, seized or hydrolocked engine, or other wiring....

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...