Q: car overheating and heater blowing cold air plus hose to heater core not getting hot

asked by on

So the car started overheating and the heater isn't blowing hot just cold. Don't think coolent is circulating because the hose isn't getting warm. Already replaced water pump and head gasket. Replaced thermostat too. Coolent reservoir is boiling as well

My car has 170000 miles.
My car has an automatic transmission.

If you replaced all those parts and it still is overheating then you have a radiator that is clogged and/or the fan is not working. You need to see if the upper and lower hose is hot when the vehicle heats up. If this is the case then replace the radiator and check the fan operation to make sure it is working.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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. car overheating and heater blowing cold air plus hose to heater core not getting hot

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: Alero won't start, no ignition coil recognition, service engine light, and beeping sound under glove compartment

I can't think of what could be beeping under your glove box. Since your vehicle uses multiple coil packs, I'm going to guess that by no coil recognition, you mean there's no spark. There are several potential causes for this,...

Q: EGR valve and vacuum

If you got code P0401 for the EGR system malfunction, then the system would need to be tested to see whether or not the vacuum modulator valve is holding vacuum and can control the EGR valve. These tests are needed...

Q: Why does my ac turn off due to high engine temperature on my 2014 Chevrolet Cruze

Hi there. If the engine is getting hot then the computer will turn off the a/c system to protect the engine. This can be caused by an issue within the cooling system or possibly a bad sensor. The system would...

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...
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...