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2004 chev impala, no hot air for heat, changed thermostate no difference

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Get the heater core flushed if youy can verify that the valve in the upper heater hose moves when you go from hot to cold.

Posted on Nov 17, 2009

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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.

Dec 30, 2014 | 2004 Chevrolet Impala

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My 2004 chev impala headlight won't turn on and


If you made sure your battery connections are tight then you may need trace you hot wire for a bad connection around the fusible links that run from battery.

Aug 23, 2013 | Cars & Trucks

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2004 cheverolet impala 3.4L engine - Started running hot. Had never changed antifreeze, bought a flush and refilled with antifreeze. Ok for several weeks, started running hot again. Replaced the...


Sounds like you have an air;lock in your cooling system.Try placing a bleeder on the return hose to the heater core ........looks like a small tap

Aug 18, 2010 | 2004 Chevrolet Impala

1 Answer

2004 Chev Impala, temp gauge registers hot while stopped at light, will return to normal temp while driving. Fluid is rust colored and "gooey". The same for the overflow. I drained and flushed with Peak,...


Unless you replace the water pump you are going around in circles. When you drive you have the natural air-flow thru the radiator and water circulastion will occur ie hot water rises cooler water sinks. If you havn't already damaged the cylinder head your lucky .White gooey residue on dip stick or oil filler cap will be an indication of this. Rust colored water indicated the adsence of inhibitors or coolant fluid and internal corrosion will be a consideration .

Apr 05, 2010 | 2004 Chevrolet Impala

3 Answers

Would the heater control valve malfunctioning make the engine overheat blowing hot air out the heater one moment,then not blowing the hot air, temp gage spikes 225 plus. The motor takes awhile to heat up...


Heater control valve malfunction will not cause engine to overheat unless coolant is leaking externally...Overheating going down the road can be the result of a few different things...Partly clogged radiator...Insufficient air flow due to possible fan problem...External coolant leak...Make sure fans are operting properly and have cooling system pressure tested for leaks...Gaining and losing heat on the inside of the vehicle usually means system is low on coolant but you must find out where coolant is going

Jan 06, 2010 | 2004 Chevrolet Impala

1 Answer

I have a 2008 chev Impala and the dual control puts out heat on one side and cold. Whats wrong with it, and How can I fix it


have a 2008 chev Impala and the dual control puts out heat on one side and cold. Whats wrong with it, and How can I fix it

Dec 27, 2009 | 2004 Chevrolet Impala

2 Answers

My heat works on the passenger side and not the drive i've changed the thermostat and still the problem hasn't changed


If you have good heat on one side, it can't possibly be the the thermostat. Good heat on one side means that there is plenty of hot water (water and antifreeze mix) circulating through your heater core. The thermostat controls the temperature of the water. If you have hot water, the thermostat is not at fault. Your Impala is equipped with what is called "zoned climate control". All the inside air (both sides) is still heated by the same heater core. The difference between a "zoned" system and a conventional system is that there is more than one "blend-air" door insided your HVAC housing. The blend-air door swings back and forth to direct the incoming air either through the heater core (for hot air) or around the heater core (for cold air) The drivers blend-air door may be broken or the motor that moves the blend-air door is malfunctioning.

Oct 10, 2009 | 2005 Chevrolet Impala

2 Answers

COST OF REPLACING A THERMOSTAT ON A 2004 IMPALA


Thermostat itself is like 8 dollars, from Kragen, or Autozone.

Apr 08, 2009 | 2004 Chevrolet Impala

1 Answer

I have a 2004 Chev Impala and the temp guage went way past any numbers and wasn't hot. The speedo also stayed at 30 mph went the car is stopped. The speedo started working again when I shut it off and...


if you remove wire connection from temp sender unit and guage goes down then reconnect it goes up ? it is probably the temp sender unit is fault this is if you are certain engine/coolant system is ok and no indication of o/heating ?

Dec 30, 2008 | 2005 Chevrolet Impala

1 Answer

Heaterblows cool air my temp gauge showing truck is overheating


change the thermostate and gasket after you change it let the truck heat up then cool then refill the radiator again after the thermostate opens do not open the radiaator with the truck hot or the upper hose hard

Dec 10, 2008 | 1992 Ford Explorer

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