Skip the auto shop - Our mechanics make house calls

Q: Thermostat needle going to just past hot side

asked by on

When I sit at light or drive-thru for several minutes the thermostat needle goes to the hot side it goes just a bit past the middle line once I start driving it goes back down. Checked fluid and it is full. It's been 3 or 4 yrs since changing fluid.

My car has 116000 miles.
My car has an automatic transmission.

Hi, thanks for writing in. This is a sign of a faulty or sticking thermostat which is what regulates the coolant flow in and out of your car engine. When this is stuck and closed, it can cause the coolant not to circulate properly, which will cause the temperature to overheat as a result. This can also happen when your radiator has passages that may be clogged which can be fixed by having it flushed. I would recommend having an expert from Your Mechanic come to your home to perform a cooling system service.

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: coolant mix with oil running hot

The coolant will mix with the oil on these engines due to a couple possible problems. The intake coolant passages will leak into engine through the intake o-ring gaskets. The other possible cause is the head gaskets and heads will...

Q: When I turn my car on the idle is high and it doesn't come down. When I drive, it basically drives itself.

Hi and thanks for your question. Check the gas pedal to see if it is coming all the way up. Check the throttle body to ensure that the throttle plate is not sticking. If everything is working correctly, check the...

Q: I have no idea

The overheating may have potentially caused a blown cylinder head gasket. When this happens, this causes the cylinder to take on additional air leak that causes a drop in compression inside the combustion chamber. This will ultimately cause the car...

Related articles

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...
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...