Last post on Jan 29, 2013 at 2:06 PM
You are in the Chevrolet Blazer
What is this discussion about?
Chevrolet, Heating / Cooling, SUV
#117 of 154 1999 Chevy S10 Blazer 4.3L engine
Oct 31, 2009 (9:11 am)
Issue: no heat. A/C works fine, blower works fine, but it seems when I turn the temp control knob, it turns too easily. I understand there is a baffle that the knob controls to reroute from A/C to heat, but not sure where it is or how to get to it. My thermostat is fine, but going to replace it anyway, along with a new radiator cap. Have not completed a coolant flush, am scheduling that in the next couple of weeks. I also heard it might be some sort of relay switch, located under the hood near the firewall? Any assistance?
#118 of 154 Re: 1999 Chevy S10 Blazer 4.3L engine [bigdaddy6886]
Nov 01, 2009 (9:53 am)
The first thing you should do is go to the dealer and get them to copy the diagrams from the parts catelog. There are acouple of them that show different views. Also get the pages which list the parts and description that go with the diagrams.
this will help you find the baffels or doors (3) that control airflow and the parts that control them. Check the hoses at the firewall going in and out of the heater to see if they are hot.
#119 of 154 Heater problems with starting and stoping
Dec 18, 2009 (6:56 am)
Hello I have a 1997 Blazer. The heat didnt work when I got it. I direct wired the blower to the batt and the motor was fine. I replaced the switch that operates the fan speed and it worked for a week. Now it only works sometimes. If I hook a direct connection to the fan fan it always goes on. Also I noticed that the heater doors dont appear to be working I can only get defrost and some heat out of the bottom. are these electric or vaccum? I live in upstate NY ( 14 degrees here today )so I really need the heat and defrost any suggestions?
#120 of 154 computer wont read
Dec 18, 2009 (7:30 am)
Hello I have a 1997 blazer. I took it to get it inspected but because I installed a new battery and only drove 40 Miles it mech. said it wouldnt read it yet. I have since put on 140 miles and 2 days ago the check engine went on and stayed on for the afternoon. The next day it was off and hasent been on since. I brought it back for th einspection and again it read " computer not ready to read) Can anyone tell me why or what I can do. I need an inspection. Please note I took it to a friend of mine who has one of these hand held computer checks and he said it didint show any errors that I should be fine. This was BEFORE my return to the shop for inspection.
#121 of 154 2001 ZR2 Heater problem
Jan 06, 2010 (2:34 am)
I have plenty of heat. The problem is it only blows out of the vents no matter what position the switch is in. I replaced the control panel but the problem remains.
#122 of 154 Re: 2001 ZR2 Heater problem [rlhirst]
Jan 06, 2010 (10:28 am)
Check the vacuum lines from the intake manifold, to the tee near the brake booster, to the vacuum resevoir in the drivers fender behind the underhood fuse box. These lines rot and since the controls are vacuum operated, they won't work.
#123 of 154 1998 Chevrolet Blazer A/C
Jun 06, 2010 (1:01 pm)
My girlfriend owns a 1998 Chevrolet Blazer....She was told recently by a mechanic that if you don't use your A/C much, it could actually harm your engine. Is this true at all ?
I would appreciate some help on this. Thanks so much.
#124 of 154 Re: 1998 Chevrolet Blazer A/C [yourangellady]
Jun 06, 2010 (3:14 pm)
I've never heard that before and don't know how it's possible but maybe someone else can offer some insight.
SUVs and Smart Shopper
#125 of 154 Re: 1998 Chevrolet Blazer A/C [tidester]
Jun 06, 2010 (5:38 pm)
Whoever told your girlfriend that is nuts. AC takes power from the engine just like the alternator, the power steering and the transmission and wheels. The AC is no different. That's what the engine is there for. Engines in cars made without AC do just fine. There is no way that not taking energy from the engine is going to hurt it.
#126 of 154 Re: 1998 Chevrolet Blazer A/C [yourangellady]
by Stever@Edmunds HOST
Jun 06, 2010 (7:02 pm)
In the old days, you were supposed to run the AC a few minutes a month all year round. As I recall, this was to keep the seals flexible (in the compressor I guess).
Nowadays the AC will kick on when you run the defroster to dehumidify the air, so you shouldn't find anything in your manual about running the AC. And I don't see why never running the AC would hurt anything.