Skip the auto shop - Our mechanics make house calls

Q: Replaced the radiator but now my can is running hot. Never had this problem until the radiator was replaced

asked by on

Why is my car running hot after the radiator has been replaced never had thus problem until now since i had the radiator replaced
My car has an automatic transmission.

A: There area number of things that can make y...

There area number of things that can make your car run hot such as low coolant levels, a faulty thermostat, or a failing coolant fan switch. As you may know, the coolant fan switch helps to maintain the proper coolant temperature by turning on and off at specific temperature thresholds. When this switch is not working properly, this can cause the fans to come on intermittently, all the time, or sometimes not at all. When this happens you will notice a temperature spike and drop occasionally as the fan comes on and off. When your thermostat is not working properly or is stuck closed, this will not allow the coolant to properly circulate through the engine, which may cause the engine temperature to fluctuate erratically or in some cases just remain hot. I would suggest having an expert from YourMechanic come to your home to diagnose your cooling system.

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: The engine loses power after accident, warning lights on

The engine computer will need to be tested to see the codes received. There is a problem in the system that is causing the computer to go into failure mode and limit the throttle opening. Considering the fact that you...

Q: Will bad brake calipers cause excessive vibrating in steering wheel while driving?

This may very well be caused by the uneven wear on the front tires. When uneven tread is subjected to various road conditions or braking power, this will definitely cause a vibrating or shaking feeling. This may also be caused...

Q: Is it possible to crack an engine block by flushing the radiator?

Hi there: Is it possible - certainly. If the engine block is hot and the coolant being flushed is cold, it's actually rather simple for small cracks to develop inside the water passageways. It really depends on the condition of...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...
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.