Skip the auto shop - Our mechanics make house calls

Q: What is causing temp to go up and seems like car doesn't have usual power.

asked by on

Replaced thermostat &pump fri plus added coolant. Light came on yesterday. added coolant this am. Now this afternoon almost 7hrs later after not using car for that time temp is going up? About 3 notches after 200. Turned heater went dwn a little. What could be the problem?

My car has 94000 miles.
My car has an automatic transmission.

This can be caused by a number of factors 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. A YourMechanic certified technician can come to your location to perform a Temperature Warning Light is On Inspection on your vehicle and help you diagnose this issue and recommend repairs.

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
  • What is causing temp to go up and seems like car doesn't have usual power.

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: Starts and dies.

There can be a few things that can cause your vehicle to start and die. Some of the more common things that can duplicate this problem would be an intermittently failing fuel pump. A weak fuel pump may have enough...

Q: How do I replace my thermostat housing on my 2008 Chrysler 300

Hi there. Replacing this part does not require a lot of knowledge of cars, but you do need to have some mechanical experience to keep you from damaging anything. The thermostat housing can easily be broken when installing it if...

Q: Clutch slipping

Hi There, It sounds like you may have some burnt clutch plates that may be causing the clutch slipping. Your clutch is essentially a spinning disk attached to the transmission's input shaft (the shaft that feeds power into the transmission)....

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...