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.

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

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!
  • Home
  • Questions
  • Replaced the radiator but now my can is running hot. Never had this problem until the radiator was replaced

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 1998 lexus gs4oo. I was driving it, and all of a sudden it started to die on me, it didn't die all of a sudden ,it kinda

There are a couple of sensors in your car that regulate the flow of fuel and air into the car's engine. One is called a mass air flow sensor. This regulates the air flow into the car's engine to make...

Q: High pitched whistle sound

It sounds like you may be having an issue with your suspension or brakes on the passenger rear side of the vehicle. I would recommend a brakes and suspension inspection be performed on your vehicle by a qualified professional to...

Q: Car not moving when pressing the gas pedal

The first thing to check would be the shifter cable and adjustment, and check the computer for transmission codes, especially range sensor codes. If the computer does not know the car is in “drive”, it will not activate the proper...

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 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...