Question about 2004 Chevrolet Impala

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Why doesn't my heater work in 2004 Chevrolet Impala

Heating and air unit works occasionally. What could be the problem?

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First check the Fluid level in the Radiator while engine is cool and add if necessary. If that is ok, then you probably have a bad circuit board on the Blower fan, or the blower itself, those are together under the passenger side dashboard. water leakage caused my wife's to go because the drains at the bottom of windshield were clogged with dirt and rotting leaves. Cost around $50-$100 if you do it yourself and get parts online cheaper!

Posted on Nov 29, 2012

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Posted on Jan 02, 2017

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SOURCE: 2004 Impala heater stopped working

sounds like ur thermostat is sticking open its an easy repair if u wanna get an ideal how to do it u can get a service manual from the libruary

Posted on Jun 13, 2008

  • 83 Answers

SOURCE: over heating

sounds like an air pocket or waterpump may be on way out.

Posted on Jan 03, 2009

  • 574 Answers

SOURCE: 2004 Chevrolet Impala tire pressure light guage

1. turn the ifnition to ACC or ON and turn the radio off
2. press and hold the DISP button on the radio for at least five seconds until SETTINGS is displayed
3. press the SEEK up or down arrow to scroll through the main menu
4. Scroll until TIRE MON appears on the display
5.press the PREV or NEXT button to enter the submenu. RESET will be displayed.
6. press the DISP button to reset. A chime will be heard to verify the new setting and DONE will be displayed for one second.
7.Once the monitor has been reset, scroll until EXIT appears on the display
8.Press the DISP button to exit programming. A chime will be heard to verify exit.
The system completes the calibration process during driving
This only works if you have a RDS system on the radio.

Posted on Aug 24, 2009

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SOURCE: 2004 impala a/c blower not working

No it can not.
You have a couple of actuators that have gone out. The driver temp control. And the air inlet actuator.
And I don't fallow your statment of "my a/c blower went completely out. I tested the blower and it works fine".

If the blower went out, then what do you mean it works fine? Are you talking about air delivery or it just quits blowing all together?

Posted on Jul 01, 2009

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SOURCE: 2004 Chevy Impala no heat from defrost or heater

No heat is often a symptom of low coolant, usually followed by overheat. There are other controls that regulate heater, but right now, re-fill the cooling system with engine running and heater on high, then check for leaks (coolant you lost went somewhere...you need to determine where) Low coolant will damage your engine. Take care of that first, then if heater still does not work, then do diagnosis on that. (if you loose the engine heat won't matter, will it!)

Posted on Sep 22, 2009

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1 Answer

04 impala heat stopped working but fan works


Are the heater hose hot to the touch ? Two hose's from the engine that go to the firewall an into the heater core ! Manual or automatic temp. control ? Do you feel air blowing out of the vent's ? cold ? Temp blend door actuator could be bad !

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How do i change a heater core on a 2004 impala?


If it is not leaking, you probably don't need to change it. There are flapper doors which direct where air goes in the system. The flapper used to direct air through the heater core is not working. This can be caused by a vacuum leak anywhere in the engine or heater/A/C unit, a bad leaking control head, or most likely a bad flapper door actuator, hidden deep under the dash. See shop manual.

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This has got blown head gasket written all over it. How many miles are on the vehicle. Whens the last time the thermostat was changed?

Feb 18, 2013 | 2004 Chevrolet Impala

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Bad fan switch or fan?

Aug 05, 2012 | 2000 Chevrolet Impala

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Heater is not getting hot and the temperature needle isn't working


First I would have said your thermostat is stuck open. But if the engine is overheating and the gauge reads cold the cooling system is probably empty. Or there may be alot of air pockets in the cooling system instead of all liquid coolant.
If the system was full and the water pump failed the heater might not work but the gauge would read hot.

Jun 25, 2012 | 2004 Chevrolet Impala

1 Answer

I have a 2000 chevy impala my heat doesn't work,


first it to verify the coolant flow. I suspect the heater core isn't flowing, you may need to take a garden hose and take both heater hoses off, and flush in both directions to clean the heater core. flush in both directions until you get clean water flow. I am assuming the coolant level is OK, and the water pump is pumping and the engine is getting warm enough.

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2006 Chevy Impala V6. Occasionally one or both check engine or over heat dash lamps illuminate. When this happens temp gauge fails and AC doesn't work. Can have trouble starting when this condition...


PO116 Engine coolant range tempreature circuit.
I would change the temp sensor and first make sure the coolant is full in the rad with no air in the system.

Aug 15, 2011 | Chevrolet Impala Cars & Trucks

1 Answer

The heater is only working on the passenger side in my 2005 impala. the driver side is blowing cold air. please help


Do you have dual zone heat and cooling controls?
If so......the drivers side air flow control unit on the heater assembly is not working.
It is mounted on the heater assembly and can usually be accessed through the glove compartment to change it.
The stepper motor on these units fails often.
This should be the problem on your car 99%...if you have a separate heat/cooling control for driver and passenger areas.

Oct 29, 2009 | 2004 Chevrolet Impala

1 Answer

Driver side heater does not work but passenger side does.


My 2004 Chevy impala did the same thing. You have two problems going on. First of all you will need to either take this to someone or take the resovoir out and then flush the lines. I don't mean flushing the entire radiator, just the lines. That will solve the heating problem and the heater should start to work. Then if this doesn't work you could have the piece behind the dashboard stuck on air condition and that will need to be replaced, but mine did not need replacing and once the lines were flushed that solved the problem. The light on the passenger side being out on the heater control panel is a manufacture defect and GM is aware of the problem. To fix this indicator light on the control panel of the heater slide you would have to purchase a dealer part which is a small looks like on pictures almost 3 X 5 inches electronic board, which by the way runs about $300.00. Everyone has had the same problem, and everyone on this internet is mad about this. Hope some of this helps you.

Oct 25, 2009 | 2004 Chevrolet Impala

1 Answer

Over heating


sounds like an air pocket or waterpump may be on way out.

Jan 03, 2009 | 2004 Chevrolet Impala

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