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
  1. Home
  2. Questions
  3. 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: Problems with overheating, accelerating, and starting

Did all of these happen at the same time? It is possible they are related but they may be separate problems. For the overheating problem, it sounds you may have a coolant fan that is inoperative. The hesitation could be...

Q: Pontiac running hot

You are possibly low on coolant. Why the coolant is low or the engine is running hot can be anything from a thermostat, leak, radiator fans, to an major engine head gasket problem. When the vehicle is completely cold, check...

Q: My blower motor won't turn on when it's extremely cold 2003 Chevy Trailblazer

Hi there - electrical failures when cold are tough problems, because the source is an electrical connection - switch contact, brushes in the motor itself, potentially a blower motor relay - that shrinks and loses connectivity when cold. It expands...

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...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.