Skip the auto shop - Our mechanics make house calls

Q: Heats up in the summer

asked by on

The thermosta runs below the half mark in the winter but in the summer it goes up to the 3/4 mark. The air conditioner blows cold air. I have replaced water pump, thermostat, all hoses, and flushed the raditor.

My car has 17100 miles.
My car has an automatic transmission.

Check for underinflated tires, dragging brakes, and transmission faults. The most common causes of overheating include low coolant level, a faulty thermostat (OEM, dealer supplied thermostats reduce diagnostic headaches), a plugged radiator (only flow testing can determine if the radiator is clear) , a faulty radiator pressure cap, collapsed hoses, non functioning cooling fans, and a faulty water pump or drive belt. Certain engine faults, such as a leaking head gasket or poor engine running condition can also cause overheating. If you desire that this problem be diagnosed by a certified Mechanic, dispatched by YourMechanic right to your location, please request an engine overheating diagnostic and the responding certified mechanic will get this resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

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!
  1. Home
  2. Questions
  3. Heats up in the summer

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 overheats; could be thermostat housing

With the vehicle overheating I would advise caution as overheating the vehicle can cause extensive damage if left unchecked. A stuck closed thermostat along with coolant leaks are among the most common causes of overheating. A qualified technician, such as...

Q: I have a 2004 dodge durango and I've lost power to my brake lights and the trunk won't open. Fuses are good and hazards work.

Hi there. In most cases these two issues are not related The brake light problem could be an electrical relay fault; as could the trunk release issue. The brake light problem could also be due to a damaged or faulty...

Q: Check Engine light, code P0404.

Having the engine code is a great first step to getting your Pontiac Montana running up to speed again. This engine code is reading EGR, which stands for Exhaust Gas Recirculation. The EGR’s job is to redirect a measured portion...

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 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.
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.