Last post on Nov 07, 2013 at 4:56 PM
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Chevrolet Impala, Sedan
#3527 of 3636 06 Chevy Impala all windows fog over when heat is on
Dec 25, 2009 (5:42 pm)
We have a 2006 Impala and are having problems with all windows in the car fog over when the heat is on. It has gradually gotten worse. At first as long as it was on defrost it was not as bad, now it doesn't matter what setting it is on. Dealer says it is NOT the heater core but is possibly an HVAC filter that is clogged. They want to charge $120.00 to see if this is the problem. Does anyone have any suggestions before we spend this and find it is not the problem?
#3528 of 3636 Re: 06 Chevy Impala all windows fog over when heat is on [ctkeith1]
Dec 26, 2009 (11:37 am)
Changing the HVAC (cabin) filter in an '06 Impala takes less than 15 minutes. The filter can be purchased for less than $15 at Walmart or Advance Auto Parts/Autozone/Pep Boys. A dealer charging $120 to change this filter should be ashamed of themselves. ~$50 would be more reasonable (accounting for the cost of the filter plus their labor.)
I really don't see how the cabin filter could be the problem, unless yours is so clogged that it is restricting airflow to all the vents. Have you noticed a significant reduction in the flow of air coming out of the vents?
How many miles on your Impala? When was the last time you changed the cabin filter? I put a new one in mine at about the 30K mile mark, and still have that one in now at 50K miles. I did remove it a couple of months ago and vacuum it out, but put it back in. I might put in a brand new one come Spring...eventually.
#3529 of 3636 Re: 06 Chevy Impala all windows fog over when heat is on [ryster]
Dec 26, 2009 (1:00 pm)
Thanks for your reply. We really didn't think it could be the HVAC filter but it would not hurt for us to change it. However, we will change it ourselves if its not that hard. I am calling Autozone today to see about getting the filter and changing it ourselves. Our Impala has 40k miles. We'll be posting again to let everyone know what the real problem is and if changing the filter fixed it.
#3530 of 3636 Re: 06 Chevy Impala all windows fog over when heat is on [ctkeith1]
Dec 27, 2009 (4:32 pm)
I should clarify that changing the filter yourself is a 15 minute job if you don't mind getting your hands dirty and/or are comfortable working on cars. The first time I changed it, it took me 45 minutes, but much of that was just messing around trying to figure out the best way to go at it. Subsequent attempts have taken no more than 15 minutes.
The filter is not accessed by going behind the glove box like many vehicles. It is located under the windshield cowl on the passenger side of the car.
The owner's manual (page 3-23) has you remove that piece from the car to gain access to the filter. I have never been able to get the retainer pins out, so I actually lift up that piece (from the front edge nearest the engine) and slide my hand under it to get to the filter. There is just enough room for me to get my hand in there. I pull the water deflector plate out, then I pull the filter out. The new filter goes in, then the water deflector plate goes in, you reattach the weatherstrip, and that is it.
It is imperative to get the water deflector plate put back in correctly, or you could end up with a real disaster if water gets in there.
The symptoms you are experiencing sound like a heater core, but if the dealer said it is okay it must be something else. The filter is an inexpensive attempt at a solution. My car will exhibit a fogging issue on extremely cool/damp mornings, and the defogger will seem worthless. However it is no worse than I have had in other cars. I just try to keep the interior glass very clean, and that helps greatly. The film that builds up on the inside of the window (I believe it is called "outgassing") can lead to excessive fogging if it is allowed to build up. A good auto glass cleaner helps get rid of that film.
Best of luck to you and let us know how things go.
#3531 of 3636 Re: 06 Chevy Impala all windows fog over when heat is on [ryster]
Jan 10, 2010 (7:44 am)
Hello there, my bro in law is trying to fix the rear window defroster and has no owners manual, I say it is the fuse but they won't just try and do it with out the schematic on it, would you happen to know which is the rear window one?
This is also 2006 Impala. Thank you!!!
#3532 of 3636 Re: 06 Chevy Impala all windows fog over when heat is on [ladysportsbuff]
Jan 14, 2010 (5:56 pm)
The rear defroster relay is located in the underhood fuse block, in the engine bay by the battery. The cover on the fuse block simply pops off, and the rear defogger relay is labeled "REAR DEFOG". When looking at the fuse block, the rear defogger relay is on the right side, and is rather large and square shaped.
#3533 of 3636 2006 impala engine hot/ac off message
Apr 22, 2012 (2:27 pm)
#3534 of 3636 2006 impala engine hot/ac off message
Apr 22, 2012 (2:41 am)
I have owned my impala for 16 months...I've never had any problems until now. I recently got the message engine hot/ ac off. I took it to a mechanic and they replaced the climate control sensor. It was fine for almost a month. The message keeps comming back and I can get the computer reset and all is fine for about a week or a day or how ever long. When this message is on the temp gauge does not work, no heat or ac. the mechanic i took it to say's they don't know what is causing this and i need to take it to a dealer. They think it's an issue with the wires at some place. I spoke to another person about this and they think maybe the fan in some way is causing this. HELP!!!
#3535 of 3636 Re: 2006 impala engine hot/ac off message [lisairwin]
Apr 22, 2012 (2:27 pm)
I'm sorry that your Impala keeps encountering this same issue, lisairwin. If you decide on visiting a dealer to get this looked into, please let us know! We're available to assist in whatever way we can.
GM Customer Service
#3536 of 3636 I love my 06 Chevy Impala but....
Jul 24, 2012 (7:18 am)