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No heat inside and overheating

Tiny
BRETHOYLER
  • MEMBER
  • 2004 CHEVROLET IMPALA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 89,000 MILES
In less than a mile the car overheats and has no heat inside, I have no leaks and my mechanic supposedly replaced the thermostat, but I still have the exact same problem and this time he's saying its the water pump?
Saturday, March 29th, 2008 AT 1:14 AM

36 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be the water pump open the cap fill it till its 1inch below the opening-Now start the vehicle and observe the coolant is it swirling around if so pinch off the upper hose for a few secs and let go-did the flow increases- if not its the pump

This guide will help us fix it

https://www.2carpros.com/articles/car-heater-not-working

Please run down this guide and report back.
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Monday, October 29th, 2018 AT 11:32 AM
Tiny
MRNOBLES
  • MEMBER
  • 1 POST
I had this problem turned out to be a lower radiator hose leaking cost me $34.00 all fixed up
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Monday, January 13th, 2020 AT 6:46 PM
Tiny
VKRS84
  • MEMBER
  • 1 POST
  • 2004 CHEVROLET IMPALA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 61,000 MILES
In my 2004 Impala the heater is not working. We have dual climate control. One side will blow semi-warm and the other will blow cold--while both dials are set on HOT! The defrost and AC and vent all seem to be working just fine, I simply can't get the heater to get warm. (Note our heated leather seats work, and all other systems seem in order.) I'm wondering about a possible diagnosis and general price range for fixing something like this?
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Monday, January 13th, 2020 AT 6:47 PM (Merged)
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Check your coolant to ensure it is at proper level. Low coolant will cause your heater to work improperly. If it is at proper level, it could be a a few other things. Most common would be the thermostat. Most expensive would be the heater core. Heater core repairs usually cost around $500 depending on vehicle. You should have your local dealer check to see if the thermostat and heater core are both in proper working condition.
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Monday, January 13th, 2020 AT 6:47 PM (Merged)
Tiny
BANKSTHOMAS
  • MEMBER
  • 1 POST
  • 2004 CHEVROLET IMPALA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 118,000 MILES
My driver side heat doesn't work. I was told I needed a new acuator, but I do not know where it is in my car. Can you help me?
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Monday, January 13th, 2020 AT 6:47 PM (Merged)
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Under dash on the air plenum small solenoid
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Monday, January 13th, 2020 AT 6:47 PM (Merged)
Tiny
DWILLIS
  • MEMBER
  • 1 POST
  • 2004 CHEVROLET IMPALA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 67,000 MILES
My heater is blowing cold air. The engine temp gauge is reading normally. The blower is working fine, but is blowing cold air only.
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Monday, January 13th, 2020 AT 6:47 PM (Merged)
Tiny
RENAUDTN
  • MECHANIC
  • 636 POSTS
- Check your level of coolant in both the radiator and overflow tank (engine cold!). Add GM dexcool coolant if necessary.
- Make sure there's no air in your system.
- Turn car on and let it reach normal operating temp. Then turn heat on high. Now feel both heater hoses in the engine compartment. If one is cold or lukewarm, your heater core is clogged (flush or replace it).
- Although your temp gauge reads normal it could be a bad thermostat; just in case you may want to inspect it.
-If all of the above are good, you could have a bad blend door actuator
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Monday, January 13th, 2020 AT 6:47 PM (Merged)
Tiny
MOTOWNPISTON
  • MEMBER
  • 1 POST
  • 2004 CHEVROLET IMPALA
Engine Cooling problem
2004 Chevy Impala 6 cyl Front Wheel Drive Automatic 150kms miles

For the past couple weeks my car hasn't been heating up as it should. It seems like the engine will get very hot then however the heater will only put out a very small amount of heat then the engine temp will drop closer to a normal range, then it goes back up. This pattern continues the entire time I'm driving. Note I live in Ontario it's very cold most days this time of year.
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Monday, January 13th, 2020 AT 6:47 PM (Merged)
Tiny
RHALL77
  • MECHANIC
  • 3,361 POSTS
Check and see if the cooling system is full and there isnt any leaks. You may be low on coolant causing air pocket in the system
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Monday, January 13th, 2020 AT 6:47 PM (Merged)
Tiny
RAYDOME01
  • MEMBER
  • 3 POSTS
  • 2004 CHEVROLET IMPALA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 109,366 MILES
Recently the heat on my car started having problems. When the car is ideling the heat won't work if I constantly press the gas the heat will work. I can't warm my car in the mornings because the heat won't work unless I accelorate it in the driveway. Please help
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Monday, January 13th, 2020 AT 6:47 PM (Merged)
Tiny
RHALL77
  • MECHANIC
  • 3,361 POSTS
Check and make sure the cooling system is full and you dont have any air pockets in the system. You may have a water pump or an intake gasket leaking
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Monday, January 13th, 2020 AT 6:47 PM (Merged)
Tiny
BOBBYTECH1
  • MEMBER
  • 49 POSTS
Yes 4 sure its a air pocket issue, has there been any work done recently
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Monday, January 13th, 2020 AT 6:47 PM (Merged)
Tiny
RAYDOME01
  • MEMBER
  • 3 POSTS
No I haven't has any work done to my car, I am going to check for an air pocket today. I have had the car for a little over 1 1/2 and the heat worked fine about 6 months ago it just started this problem, before that it worked fine. I replaced the thermostat switch in it hoping that would fix it but it didn't so now that is why I am seeking help. Thanks
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Monday, January 13th, 2020 AT 6:47 PM (Merged)
Tiny
AXMAN101
  • MEMBER
  • 2 POSTS
  • 2004 CHEVROLET IMPALA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 69,000 MILES
I have a two question problem, 1st question: The heater does not want to put out hot air, the A/C and blower work just fine and I've checked all fuses related to the HVAC system and they seem fine. 2nd question is none of the power windows want to work, I have replaced the the outside RAP and according to the manual there is a inside RAP but I can't figure out how to get the cover to that off. I recently last my job so I'm trying to fix this myself because I can't afford to take it in and it's our only means of transportation. Thanks
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Monday, January 13th, 2020 AT 6:47 PM (Merged)
Tiny
RHALL77
  • MECHANIC
  • 3,361 POSTS
First check and see if the cooling system is full. If it is low this may cause a no heat issue. For the window, do they work on any of the switches at all?
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Monday, January 13th, 2020 AT 6:47 PM (Merged)
Tiny
AXMAN101
  • MEMBER
  • 2 POSTS
The fluid is full but really needs a flush and fill, as for the power windows, only the drivers side rear will go down about an inch then stop all others are non-op no matter which switche I try and activate. I did replace the drivers side master window switch module but it was still inop. However it does make a buzzing sound when any of the window switched are activated on the master module.
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Monday, January 13th, 2020 AT 6:47 PM (Merged)
Tiny
LATICIA
  • MEMBER
  • 1 POST
  • 2004 CHEVROLET IMPALA
  • V8
  • 4WD
  • AUTOMATIC
  • 144,000 MILES
Heater is not working and the engine light is on
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Monday, January 13th, 2020 AT 6:47 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Scan the computer for trouble code/s this is your starting point
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Monday, January 13th, 2020 AT 6:47 PM (Merged)
Tiny
LOCUT86
  • MEMBER
  • 1 POST
  • 2004 CHEVROLET IMPALA
Heater problem
2004 Chevy Impala 6 cyl Front Wheel Drive Automatic

my heater or my defroster wont work, it will kick on sometimes
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Monday, January 13th, 2020 AT 6:47 PM (Merged)

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