Q: Overheating only after driving on highway for while and the driver side heater won't work.

asked by on

I have replaced thermostat, radiator cap and ECT. Hoses look good. Fans work. No visible external leak. Drives fine around town all day or days. Then get on interstate and exit some 15 mins later and notice an overheat and decrease in heater temp. I do hear bubbling and gurgling in overflow resivoir. But i have bled the air out now multiple times. I feel like i can never get all air out. But i have done it properly. When i squeeze hose that leaves radaitor and goes to thermostat housing and the hose doesn't feel completely full of fluid more steam.. Could be in my head. Recently passenger door got hit and now i hear clicking noise under hood and only passenger side heater will work.. not driver side. Idk if this did anything but i did feel like it was working before, but im probably wrong. After i get off interstate and let cool i can drive home going 45 just fine with working heater. Last drive is when driver side heater stopped. I need help

My car has 112000 miles.
My car has an automatic transmission.

Hi there. The radiator is plugged up on your vehicle. A plugged radiator will allow the engine to operate normally in town and on surface streets, but when driving at highway speeds with the engine running at a higher speed all the time, then the radiator cannot cycle the fluid fast enough and causes the engine to overheat. This also slows the fluid down to the heater core making the heater not function correctly. I recommend seeking out a professional, such as one from Your Mechanic, to help you diagnose your cooling system before replacing any parts.

Was this answer helpful?
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. Overheating only after driving on highway for while and the driver side heater won't work.

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: My engine is shaking and making a loud ticking noise. When I’m driving up hills the noise stops. Oh , and there’s smoke coming fro

The engine should be inspected to determine the cause of the noise and the smoking. However, if the oil pressure warning light came on, the engine might have been damaged due to inadequate lubrication. The present smoke may be due...

Q: I have a 2005 Aztek Pontiac and while driving the vehicle automatically goes into neutral also my transmission does not have an in

Hi there. Although it may not be low transmission fluid, it might be an obstructed transmission fluid line that is causing this problem. It is also possible that a shift solenoid is damaged or the linkage itself is stuck or...

Q: my ECM keeps frying and im not sure where the dead short is coming from it fried 2 ecm's already. Help

Most often when there are issues like this, the problem ends up being a poor electrical connection somewhere, or an improper or poor ground. There could also be a problem in the wiring harness that is sending power back somewhere...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...