Heater blows cold air

Tiny
GAMBLER66
  • MEMBER
  • 2007 CHEVROLET IMPALA
Heater problem 6 cyl Front Wheel Drive Automatic 55,000 miles

The heater will blow cold air even when temp guage is at half way point. As soon as you drive the car it starts to heat up and work fine. Started at first to do it once in a while nows seems to be more frequent. I have checked anti freeze all fluids are fine and cap is tight no visible leakage.
Thanks
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Tuesday, December 15th, 2009 AT 7:41 PM

17 Replies

Tiny
KEN
  • ADMIN
Hello,

This sounds like you have a problem with the blend door actuator for the temperature. Here is a guide to help you see what I am talking about.

https://www.2carpros.com/articles/replace-blend-door-motor

Here is the location for your car (below)

Let us know what happens and please upload pictures or videos of the problem.

Cheers, Ken
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Monday, February 12th, 2018 AT 2:27 PM
Tiny
PAINT
  • MEMBER
Yep that did the trick for me.
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Monday, February 12th, 2018 AT 2:27 PM
Tiny
TERRY_N1
  • MEMBER
  • 2007 CHEVROLET IMPALA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 49,000 MILES
Heater problem
2007 Chevy Impala 6 cyl Two Wheel Drive Automatic 49000 miles

My heater blows cold on my 3.9L V6 at idle even though the engine temp is mid-range. As soon as I rev the engine to 2000-3000 rpm, the air blows hot. When I let it idle down, the air cools off.
Any ideas?

Terry_n1
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Monday, February 12th, 2018 AT 2:28 PM (Merged)
Tiny
DENNYP
  • EXPERT
You need to have the air bled from the cooling system.
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-1
Monday, February 12th, 2018 AT 2:28 PM (Merged)
Tiny
NORMMONUS
  • MEMBER
  • 2007 CHEVROLET IMPALA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 28,000 MILES
Heater problem
2007 Chevy Impala 6 cyl Front Wheel Drive Automatic 28000 miles

I remote start the vehicle which is pre-propgrammed to run for 10 minutes. During this cycle, there is very little to no noticeable warmth going to the windshield to defrost on cold days. The fan blows full as required (automatically). Only when I physically key start the vehicle do I get warmth.
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Monday, February 12th, 2018 AT 2:28 PM (Merged)
Tiny
KEVIN12881
  • MEMBER
I have the same problem with my 06. When you start the car, I do not have remote start, and leave it in park it will not get verry warm. As soon as I start moving, or get the RPMs over 1.2k it gets hot, even when I stop at a light I notice it gets cool again. These cars just do not have great heaters and they do not register the need for heat at idle.
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+2
Monday, February 12th, 2018 AT 2:28 PM (Merged)
Tiny
BRIAN 1
  • MEMBER
I"ve had alot of these vehicles do this, they have air in the cooling sys. Try this bleeding procedure:Poor heat at idle, however, if the engine RPMs are raised the concern no longer occurs.

Recommendation/Instructions:
Note: Be sure to follow all SI safety procedures and caution notices.

With the engine cooled off, remove the coolant pressure cap.
Remove upper heater core hose from the metal pipe on the engine.
Add coolant to the metal pipe, until full.
Raise the rubber portion of the heater core hose as high as it will go with it still attached at the heater core. Using a funnel, add coolant until the hose is full.
Reconnect the heater core hose.
Start engine, have assistant raise the RPMs to about 1500 to 1700 RPMs, top coolant off at engine, then before lowering engine RPMs, install the coolant pressure cap.
Fill coolant reservoir as necessary, then check the heat at idle.
Note: If the vehicle returns for the same complaint perform the cooling system draining and refilling procedure
see if this makes a difference, post back with any other questions.
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Monday, February 12th, 2018 AT 2:28 PM (Merged)
Tiny
GLORIA73
  • MEMBER
  • 2007 CHEVROLET IMPALA
  • AUTOMATIC
  • 90,000 MILES
No circulation of water when I open the radiator, I do not see any water leaks, sometimes it needs water but not a lot most of the times its full. The water seems like its going through the block to radiator their is no blockage. I will drive it two blocks the most and it will be on the half mark on the temperature gauge but water would be boiling when I open radiator cap. The heater and air conditioner just stopped today but over heating started 2 weeks ago. Also car has been parked 8 months prior from me buying it 3 weeks ago.
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Monday, February 12th, 2018 AT 2:28 PM (Merged)
Tiny
HMAC300
  • EXPERT
This may be a thermostat or head gasket problem have it pressure checked for leaks as it may be leaking between block and head. And have thermostat checked as that may be the problem as well.
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Monday, February 12th, 2018 AT 2:28 PM (Merged)
Tiny
RAIDER4EVR
  • MEMBER
  • 2007 CHEVROLET IMPALA
Heater problem
2007 Chevy Impala Automatic

My family got this car fairly new last year. Last winter, we had an issue where the heater would stop blowing hot air when the car would come to a stop or be idling. We took it in to the dealer, they said they checked it and there were no problems. When we got in, the heater worked fine. This year, actually a few days ago, we noticed the same thing starting. Heater will only blow cold air until we are moving. At stop lights and when idling, it goes back to cold from hot. Any ideas? I'm thinking it was something loose that the techs touched last time and fixed and maybe has come loose again, but i'm no genius with cars. Any help would be appreciated. TY
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Monday, February 12th, 2018 AT 2:28 PM (Merged)
Tiny
RHALL77
  • MEMBER
Or it could be a possible short in the wiring or a possible HVAC controller going bad. Do you have auto matic temp controls
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Monday, February 12th, 2018 AT 2:29 PM (Merged)
Tiny
LEROYJM
  • MEMBER
  • 2007 CHEVROLET IMPALA
  • 50,000 MILES
No heat when idling. Heats up when driving, cools when stopped.
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Monday, February 12th, 2018 AT 2:29 PM (Merged)
Tiny
HMAC300
  • EXPERT
Check coolant level first thenif low add and then have pressure checked for leak.
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Monday, February 12th, 2018 AT 2:29 PM (Merged)
Tiny
2CARPROS-ARCHIVES
  • MEMBER
  • 2007 CHEVROLET IMPALA
  • 156,000 MILES
My car is making bubbling noises like its running hot but it's not reading hot inside nor do the fan come on
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Monday, February 12th, 2018 AT 2:29 PM (Merged)
Tiny
CARADIODOC
  • EXPERT
If you're hearing that under the hood, look for bubbles in the coolant reservoir. If you see them there, suspect a leaking head gasket. The clue, as you mentioned already is there's no steam associated with those bubbles.
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Monday, February 12th, 2018 AT 2:29 PM (Merged)
Tiny
BRANSCOS
  • MEMBER
  • 2007 CHEVROLET IMPALA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 56,000 MILES
Heater problem
2007 Chevy Impala 6 cyl Front Wheel Drive Automatic 56,000 miles

MY heater in my car is not blowing out hot air. The only time it does is when I give it gas when idiling or when the car is moving. Then the heat is great! The rest of the time it just blows cool air. What can I do to fix this?
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Monday, February 12th, 2018 AT 2:29 PM (Merged)
Tiny
BRIAN 1
  • MEMBER
Try bleeding the coolant sys, Poor heat at idle, however, if the engine RPMs are raised the concern no longer occurs. With the engine cooled off, remove the coolant pressure cap.
Remove upper heater core hose from the metal pipe on the engine.
Add coolant to the metal pipe, until full.
Raise the rubber portion of the heater core hose as high as it will go with it still attached at the heater core. Using a funnel, add coolant until the hose is full.
Reconnect the heater core hose.
Start engine, have assistant raise the RPMs to about 1500 to 1700 RPMs, top coolant off at engine, then before lowering engine RPMs, install the coolant pressure cap.
Fill coolant reservoir as necessary, then check the heat at idle.
Note: If there is still a lack of heat at idle, perform the cooling system draining and refilling procedure
post back with what you find
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Monday, February 12th, 2018 AT 2:29 PM (Merged)

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