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Chevrolet Blazer Heating Ventilation and Air Conditioning

118 messages,  Last post on Nov 01, 2009 at 9:53 AM

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#65 of 118 Blend Door Actuator by ccfrazier2 Feb 27, 2008 (7:54 am)
Recently I had the joy of replacing my heater core in my 1999 Chevy Blazer. After having everything put back in I realized that I had one part and 3 screws left over. Well, after the first cold night I realized that the part I left off was my BLEND DOOR ACTUATOR. So my question is where does it go, how do I put it back in, and can I do it with out having to take the dash board apart again? Please help I have to do as much of my own vehicle work as possible due to the fact I am a preacher so I do not have alot of money.Thanks Replies to this message: dfhltd (Mar 03, 2008 4:53 pm)
#66 of 118 Re: Blend Door Actuator [ccfrazier2] by dfhltd Mar 03, 2008 (4:53 pm)
Replying to: ccfrazier2 (Feb 27, 2008 7:54 am) The blend door goes in the duct between the AC and heater core. It flips back and forth to blend hot and cold air even whe the AC isn't running to control the temp. That's wat the actuator does. Yes you probably do have to take the dash apart unless you can get to the place where the actuator goes. In my 96 you can't.    Go to the parts counter at the dealer and they will copy the pictures and be sure to get the list of the descriptions. They will give it to you for free. You should be able to identify 3 flaps or doors. You should be able to see the one that goes between the hole for AC and heater. The actuator is connected to the shaft of the door and bolts to the duct. The pictures from the parts catelogue will show where it goes.
#67 of 118 Re: Heater problems [dm2785] by keljerioski Mar 07, 2008 (10:38 am)
Replying to: dm2785 (Dec 29, 2007 7:48 pm) Have a 1997 Chevy Blazer, my heat will not turn on when i put the switch on at all. Like other trucks it will work when it wants to and then couple days later i will get in it and it will work all on its own any ideas as to what the problem is.   Thanks
#70 of 118 A/C Compressor Clutch not getting power by hyperhtml Apr 18, 2008 (1:48 pm)
My 1997 Chevy Blazer Compressor Clutch does not get any power when i turn on the A/C in the car...   What could the issue be? Replies to this message: jlflemmons (Apr 19, 2008 4:12 pm)
#71 of 118 Re: A/C Compressor Clutch not getting power [hyperhtml] by jlflemmons Apr 19, 2008 (4:12 pm)
Replying to: hyperhtml (Apr 18, 2008 1:48 pm) Low freon. There is a pressure switch on the side of the dryer (large silver canister near the firewall on the passenger side. If the freon charge is low, the pressure switch shuts down power to the clutch to protect the compressor.   There are two small round metal and rubber high pressure gaskets about the size of a water hose gasket but thinner that are where the two aluminum tubes bolt to the top of the compressor. These seals can slowly leak causing a freon loss. If you decide to just add freon, use the freon without oil as you haven't lost the oil from the system. If you decide to change the seals, you should have a vacuum drawn on the system before recharging. That way you get all the moisture out.
#72 of 118 2002 Chevrolet Blazer heater problems by juliemact Apr 30, 2008 (9:20 am)
Help,   My heater only works sometimes. More specifically, the blower works but only blows cold air. When I don't need the heater, it works just fine. The temperature gage occasionally reads high. I have also noticed that sometimes, when the fan switch and the heat/AC/Fan selector switch is turned off, there will be heat coming out of the vents (small amount). When I flip the fan and heater switches on; the air turns cold. When this has happened before I have changed the thermostat. This time a new thermostat did not fix the problem. What else should I consider checking?   Julie Replies to this message: jlflemmons (Apr 30, 2008 10:50 am) juliemact (Apr 30, 2008 1:34 pm) jlflemmons (Apr 30, 2008 6:45 pm) and 2 more...
#73 of 118 Re: 2002 Chevrolet Blazer heater problems [juliemact] by jlflemmons Apr 30, 2008 (10:50 am)
Replying to: juliemact (Apr 30, 2008 9:20 am) How many miles on the Blazer, and has the antifreeze been changed and cooling system flushed. Very important, this vehicle uses the long life Dexcool antifreeze and cannot be mixed with conventional ethalene glycol (the green stuff). Replies to this message: juliemact (Apr 30, 2008 1:34 pm) jlflemmons (Apr 30, 2008 6:45 pm) juliemact (May 01, 2008 8:09 am) and 1 more...
#74 of 118 Re: 2002 Chevrolet Blazer heater problems [jlflemmons] by juliemact Apr 30, 2008 (1:34 pm)
Replying to: jlflemmons (Apr 30, 2008 10:50 am) It has 120,000 miles and yes I still use the orange antifreeze. It has been flushed and the heater core was replaced in December.   Julie Replies to this message: jlflemmons (Apr 30, 2008 6:45 pm) juliemact (May 01, 2008 8:09 am) jlflemmons (May 01, 2008 3:07 pm)

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