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heater not blowing hot air

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mfowler12

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My wife's car, 2005 GP v6 (non-s/c), has a heater blowing cold air. We've done two complete radiator flushes. I added the green mixture instead of DexCool the second time around. I've replaced the thermostat and have checked all of the hoses for leaks. The hoses going to and from the heater core are very hot. When flushing the radiator, both times, I flushed out the heater core as well. Once I do a radiator/heater core flush, the heater works perfectly. About a month later, the issue comes back.

Any thoughts?
 


It cold still be clogging up. If a heater core is really plugged a flush might only help for a short period of time.
 


You need to bleed the air out of the system. There is a bleed valve on top of the thermostat housing. Open it until you see coolant coming out, then close it. Make sure you have heater blowing full blast.
 
RobzSS said:
You need to bleed the air out of the system. There is a bleed valve on top of the thermostat housing. Open it until you see coolant coming out, then close it. Make sure you have heater blowing full blast.
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How do you come to this conclusion?

On the day after my previous post, I drove my wife's car to work. When getting onto the interstate, I gunned it and got up to 70 fairly quickly and heard gargling noise in the interior of the cabin. I figure it came from the heater core so this is why I think I may have air in the system. Does that help the diagnose the issue?
 
mfowler12 said:
How do you come to this conclusion?

On the day after my previous post, I drove my wife's car to work. When getting onto the interstate, I gunned it and got up to 70 fairly quickly and heard gargling noise in the interior of the cabin. I figure it came from the heater core so this is why I think I may have air in the system. Does that help the diagnose the issue?
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the gurgling means you DO have air in the system.

Bleed it before you get hot pockets in your engine and damage something.
 
This happened to my car. I learned from another forum how to fix it. It sounds like water is splashing around in the dash huh. Just bleed the air and you'll be good to go.
 


there are 2 motors that are under your dash that control whether hot air is released into your car. they are stuck. very common problem. i just fixed this in my car. cost me $32. pm for more info
 
What did u have to do

What did u do

05Sleeper said:
there are 2 motors that are under your dash that control whether hot air is released into your car. they are stuck. very common problem. i just fixed this in my car. cost me $32. pm for more info
Click to expand...

what did u do

Ok my car is blowing out warm air in stead of hot air. The ac works no problem. What could be the problem
 
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