Skip the auto shop - Our mechanics make house calls

Q: When the a/c turn on after 20minutes the temperature goes to the red line

asked by on

My engine newly top overhaul new head gasket new water pump new radiator new thermostat but still overheating

My car has 250000 miles.

A: Hi there. Believe it or not, this issue ten...

Hi there. Believe it or not, this issue tends to be very common after a major repair has been completed. In most circumstances, the overheating issue is caused by an obstruction in the coolant tubes; either an air bubble or debris from inside the engine block. However, it could be electrical including a relay or wire that was not correctly installed or a ground issue that’s not allowing the thermostat to open. To pinpoint the precise source, I’d recommend having one of our local mechanics from YourMechanic come to your home or office to complete an engine is overheating quickly inspection.

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: Car won't start with a loud clicking sound coming from starter

A starter like any other mechanical and electrical part is subject to failure sometimes for no apparent reason. However, sometimes this is misdiagnosed as well and often mistaken for something much more simple like a fuse or starter relay. ...

Q: Heat messes up Crankshaft Sensor Position

Hello. From your description, it sounds like you have a head gasket leaking if you are not finding an external leak. This is most likely the cause of the misfires, spark plug issues, and other problems. To pinpoint the problem,...

Q: Idle sounds real rough

This may be a sign of a failing idle air control valve. The idle air control valve is located on or near your intake manifold that monitors the air intake as it is mixed with fuel prior to being injected...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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 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...