You are here: Forums SUVs Chevrolet Blazer Chevrolet Blazer Heating Ventilation and Air Conditioning

Chevrolet Blazer Heating Ventilation and Air Conditioning

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

You are in the Chevrolet Blazer Forum. Your Hosts are steve_ & tidester

What is this discussion about? Chevrolet, Heating / Cooling, SUV

Messages Page 10 of 13 1 ... 7 8 9 10 11 12 13 Prev Next Last

Go To Msg # Search This Discussion

#84 of 118 Vent Control Problem with '88 S10 Chevy Blazer by jbil Jun 28, 2008 (5:26 pm)
The heater/AC on my '88 S10 Chevy Blazer blows hot/cold air well. However, when I adjust the selector to any of the AC choices, the air only blows on the floor rather than the dash vents.   I've checked to see that the 2 vacuum hoses are connected to the heater/AC diaphragm on the floor. Maybe the other ends aren't connected.   Questions   1. Could this be the reason that the baffles don't adjust to bring the air to the dash vents?   2. If so, is there a diagram showing their location on the other side of the firewall?   3. Is there a handy "how to" cheat sheet to disassemble/reassemble the heating/AC system if it turns out that the diaphragm is bad?   My Chilton manual is lacking any information on how to troubleshoot this problem,   Thanks a million,   Jbil
#86 of 118 Air Conditioning Blowing Hot Air by mphreha Jun 26, 2008 (11:34 am)
I have 2000 Blazer that only blows hot air when the AC is on. I tried adding freon, however it seemed to be fully charged as it did not take much at all and continued to blow warm air. I'm thinking there is not a leak since it seems to be under pressure still. Could this be thermostat related? Any thoughts advice woudl be greatly appreciated. Replies to this message: jlflemmons (Jun 27, 2008 4:58 am) mphreha (Jun 27, 2008 9:58 am) bluetwinbill (Jun 27, 2008 1:14 pm) jimmy99slt (Jul 03, 2008 12:26 am)
#87 of 118 Re: Air Conditioning Blowing Hot Air [mphreha] by jlflemmons Jun 27, 2008 (4:58 am)
Replying to: mphreha (Jun 26, 2008 11:34 am) Others will have more detail, but there is a baffle in the duct work under the dash that regulates the cold/hot mix from the evaporator and heater cores. If you are sure that the freon charge is correct, this may be where the problem is.   When you say the air is hot, do you mean hot like in ambient outside, or hot as in heater? Replies to this message: mphreha (Jun 27, 2008 9:58 am)
#88 of 118 Re: Air Conditioning Blowing Hot Air [jlflemmons] by mphreha Jun 27, 2008 (9:58 am)
Replying to: jlflemmons (Jun 27, 2008 4:58 am) I'm pretty sure that the freon charge is correct. We tested the pressure before and it was already in the blue/acceptable level, so we were not able to add much more. The hot air feels more like heater heat and not ambient heat.
#89 of 118 Re: Air Conditioning Blowing Hot Air [mphreha] by bluetwinbill Jun 27, 2008 (1:14 pm)
Replying to: mphreha (Jun 26, 2008 11:34 am) Soounds like the AC clutch not kicking in as I had same problem and neighbor shows me how to "fix". The is on the right when looking at the engine, it looks like the underside of a oil filter. Anyway it is round and is supposed to spin, when ac kicks on. I guess its an electromagnetic thing which i know nothing about. Anyway just touch it with your finger or a stick real quick and it takes off spinning, at least mine did. So min works like 75% of the time. Every once in a while have to use the stick to get it going. Can you tell I'm not a mechanic? Wonder how much will cost to fix right.
#90 of 118 Re: Air Conditioning Blowing Hot Air [mphreha] by jimmy99slt Jul 03, 2008 (12:26 am)
Replying to: mphreha (Jun 26, 2008 11:34 am) If your compressor is spinning and you have the automatic climate control, see air blend motor/actuator. If you don't find it in the blazer side check gmc jimmy. Its hidden behind the glovebox up and to the left. Did you ever hear a funny clicking from over there?
#92 of 118 Air conditioning by antique_maggie Jul 07, 2008 (10:30 am)
My hubby (the autoparts salesman) says our '92 will need a new condensor, hoses (and some other word I can't think of) to get the air blowing cold again (apparently it's gone beyond just the r-12 or whatever it takes). Anyone know what this might cost?
#93 of 118 Grrr. I hate R134a by jlflemmons Jul 11, 2008 (7:50 am)
'99 Blazer 4dr, 2wd. Great little suv, minimal problems, bought it for my son. but whoever designed the AC system should be flogged.   It has a very, VERY slow leak. Actually, it had two leaks. We found one and repaired it, the other is yet to be found. My complaint is that the little beast only holds about 32 ounces of R134a freon when fully charged, but if it loses just 4-6 ounces, the compressor starts short cycling and cooling performance drops in half.   So, every six months or so I have to buy a $7 can of R134A, use 1/2 or less of it, and head on down the road. Not losing any oil, dye doesn't show up anywhere, so we are talking TINY leak, somewhere.   You could throw major bucks at a problem like this, and never fix it.

Messages Page 10 of 13 1 ... 7 8 9 10 11 12 13 Prev Next Last

Go To Msg # Search This Discussion

You are here: Forums SUVs Chevrolet Blazer Chevrolet Blazer Heating Ventilation and Air Conditioning