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My heater in my 2005 chevy impala only gets warm when it wants to. I have put in fresh antifreeze and there is no water leakage on the floor of the car

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Common problem. Most likely rust and / or contaminants have built up inside the heater core. Recommend a back flush of that heater core. The DIY procedure is to remove both hoses going to the heater core and attach a water hose to the "output" side. Preferable to have a "trigger grip" nozzle attachment to regulate the water. Have the other hose directed to a large container to receive the volume of water to be ejected from it. Proceed to flush the core and notice in the receiving container if rust or matter is in fact the problem. NOTE OF CAUTION: Sometimes a worn and failing heater core may be too weak for this test and may fail and be damaged. You would then need to have the core replaced and that can be a large job. Weigh your options. Most times it will be a success and your heater will be back to normal. ANOTHER PROBLEM COULD BE THE DOOR THAT SWITCHES BETWEEN A/C AND HEAT. That door is usually vacuum actuated. It could be the vac hose or diaphram is leaking at some point or the mechanical door is getting stuck. I would consult a repair manual to see how involved the repair procedure is and go from there. Good Luck!!!!!

Posted on Nov 13, 2014


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Posted on Jan 02, 2017

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SOURCE: 2008 Chevy Impala, the heater will not stay warm

It sounds like you have a water flow problem. Either low coolant in the radiator, or a bad water pump.

Posted on Nov 06, 2009

SOURCE: heater does not work on my 2005 chevy impala ls

If you car is coming to temp but you get nothing from the heater the first place to look is the coolant valve for the heater core. It is sometimes called a mixing control. See if the control is jammed or your control cable is frozen or disconnected from this valve.

The valve should be somewhere near the cooling lines leading into the heater core. I am sorry, but they may be under the dashboard as well.

Good luck and be careful.

Posted on Dec 11, 2009

  • 1586 Answers

SOURCE: 2004 Chevy Impala no heat. Fan OK. Engine warms

Your heater core is clogged. You can fix it. Disconnect the two heater hoses and put one into a bucket. Use an air compressor to blow into the other - it'll flush the contents into the bucket. Then reverse it - put the hose you blew into, in the bucket, and blow into the one that was in the bucket. This way, whichever side of the core had the clog, you can blow it out. Reconnect the heater hoses, and then burp the system or you can end up with air bubbles in the cooling system that can cause you to overheat. Click my screenname, go to Tips and Tricks, and follow the procedure there - it'll walk you through the whole procedure step by step.

Posted on Dec 23, 2009

  • 31 Answers

SOURCE: The car is 2003 Impala. Heater takes forever to

common impala problem friend of mine has a 2000 with the same problem just cover the grill so that cold air does not blow into the rad it should give you your heat back

Posted on Jan 12, 2010

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In 2005 chevy impala the heater only gets warm sometimes. Other times it blows cold air. I put fresh antifreeze in. And there is no water on the floor of the car

The adding adding coolant means you have a leak somewhere, and low coolant level will cause this. How often do you check the fluid levels? Check for leaking hoses, weak radiator or expansion tank cap, leak at the water pump, and leaks around the radiator.

Nov 13, 2014 | Cars & Trucks

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Why doi hear water in the dash on a 2004 chevy impala

That's the antifreeze entering and exiting the heater core, which is located behind the glove box of the dashboard. If there is sweet smell or antifreeze on the inside floor on the passenger side, you have a leak in the heater core.

Aug 26, 2014 | 2004 Chevrolet Impala

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I have a 2004 chevy impala that overheat when I turn on the heater fan. A/c fan doesn't cause this problem. Have replaced thermostat, put in new antifreeze and replaced radiator cap. doesnt seem to be...

You may have an air pocket in the engine block. Make sure it is bleed properly. Also, some water pump impellers have been known to breakdown, made of plastic. A head gasket leak can also appear to be a boiling over condition.

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1 Answer

Why does the floor stay wet on the passenger side in my 2005 chevy impala

Put a white cloth on it. If its green or orange (the same color as your antifreeze) its your heater core going out.

Oct 28, 2013 | 2005 Chevrolet Impala

1 Answer

How to replace 2008 impala heater core

Most heater cores are located behind the dashboard. This can be a difficult job putting it back together. Be sure it really is the heater core. ie water on the floor boards,the smell of antifreeze inside the cabin.Steamed windows all indicate the heater core.

Oct 12, 2012 | 2008 Chevrolet Impala

1 Answer

Sugary burning smell while driving

That smell is most likely antifreeze. If the smell gets noticeably stronger when you turn on the AC/Heater, it is possible that your "heater coil" has started leaking. You will need the services of a professional if that is the case. Those are very hard to change.

Another possibility is your thermostat is not opening, causing your engine to overheat - steaming some of the coolant (antifreeze)/water mixture out of the system.

And thirdly, it is possible that someone spilled antifreeze on the radiator etc when adding fresh antifreeze - and you smell it after the engine warms up. If your car is not over-heating and you are not having to ad antifreeze/water to the radiator, then just keep driving. The problem will most likely go away.

I hope this is helpful to you. If yes, please take a sec to rate me. Thanks!

Apr 04, 2012 | 2000 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.

Sep 15, 2011 | 2000 Chevrolet Impala

1 Answer

We own a 2005 chevy impala every once in a while there would be a big puddle of what looks like water on the front floor on the passenger side of the car. we brought the car to a glass repair shop and they...

Sounds like your "Heater Core" is leaking from inside your dash. Water on the floor is a classic symptom of it.

Cheap part to replace, but can be a pain with having to take apart your dash to get to it.

Jul 04, 2010 | Chevrolet Impala Cars & Trucks

1 Answer

Drain collant system

You may not have drain plug but look on the drivers side of radiator at the bottom.If not you will have to take the bottom radiator hose off to drain.Run sme fresh water through it a few times,like three.Put in about 1 1/2 gallons of straight antifreeze,you will already have water in the block.You may have to bleed the air out.Look on top of the thermostat housing for bleed screw,and maby one of the metel heater lines,warm up and opem these just anough till only coolant comes out.If not warm up,cooldown a few times,checking coolant when its cool,may have to cycle a few times.DONT OVERHEAT THIS MOTOR,good luck

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