Last post on Jan 29, 2013 at 3:06 PM
You are in the Chevrolet Blazer
What is this discussion about?
Chevrolet, Heating / Cooling, SUV
#133 of 154 Re: 1998 Chevrolet Blazer A/C [jlflemmons]
by steve_ HOST
Jun 28, 2010 (9:48 am)
I think the long term trend in cars is to lessen required maintenance as much as possible. So my feeling is that the engineers have improved the seals so that there is little risk of failure by not using the AC. Plus as you say, the AC comes on with the defrost.
Then again, I suppose the manufacturers know that most people trade cars every 3 to 5 years and so they don't mention maintenance for marketing reasons, since many (most?) of us don't want to maintain things. But both my cars are over 10 years old and I just use the AC or defrost as needed, not on some "monthly" schedule.
#134 of 154 More Heat Issues
Jan 04, 2011 (4:24 am)
I own an 04 Blazer LT with 4WD and the heat was blowing cold. The mechanic received a code indicating the thermostat needed to be replaced. They also replaced and winterized the antifreeze, etc. That was on Thursday. On Sunday it was again blowing cold.
I felt it was a partially clogged heater core but they replaced the thermostat which seemed to resolve the issue for about 2-3 days.
Any suggestions and should the dealer do the repair free of charge for not fixing it initially?
#135 of 154 Re: More Heat Issues [ncastor]
Jan 07, 2011 (6:21 pm)
To tell if the thermostat is bad, look at the temp gage on the dash. It shoulkd be in the middle. If it's way in the cold zone it's no good. Assuming the coolant in the engine is hot according to the gage then the heater should be getting hot coolant. Find the two hoses that connect the heater to the engine and wrap your hand around them to see if hot coolant is flowing in them or not. If they are hot you have a problem with the air doors inside the heater and the control that adjusts how much hot and cold air to mix. Yours could be stuck sending all outside cold air and no warm air. I don't know about your model but some have a water control valve that controls the volume of hot water the heater gets. It might be stuck shut. find it and test it to see if it opens and closes when you apply 12v to the terminals. If it works it is still possible the signal from the heater controls is bad and telling it to shut off. Then you would have to find out why there is no signal when you turn the controlls to max heat.
#136 of 154 Re: Too much heat! [focker1993]
Mar 21, 2011 (1:20 pm)
#28 of 135 Too much heat! by focker1993
Jul 21, 2007 (12:50 pm)
I have a 1999 Chevy Blazer with the climate control. The problem is with my heat, it never stops. It constantly blows heat out of the vents. I can still change the direction ( defrost, floor, vents) and the speed of the blower, but cannot shut it off. The AC will not come on, the light comes on, but never any cold air, which I am thinking that it has something to do with this. I am looking for any suggestions please. It is hot outside and is unbearable sometimes to drive. Thank you very much
Any help to share a solution to this posting? Thank you so much
Mar 26, 2011 (1:02 pm)
I have a 98 blazer and have no a/c dont know where to start
#139 of 154 a/c causes water leak
Aug 03, 2011 (2:44 pm)
my 95 blazer overheated today -got it home -filled with water -fine, no leaks. turned on a/c compressor,; within 2-3 minutes, sprang a leak. cannot find source, but it's dripping down on right side of bell housing area ( i think). the a/c condenser and heater core are separate, right? why a WATER leak when running a/c?????
Oct 11, 2011 (11:24 am)
What are the best replacement wiper blades for our vehicle?
#141 of 154 Re: Wiper Blades [alex85061]
Oct 11, 2011 (12:10 pm)
AC Delco 8-2162 (GM-89000993)
16"insert with steel frame.
RH and LH wiper.
The have the AC Delco logo faintly printed on each blade to keep your Chevy all GM.
#142 of 154 Re: 99 LT blazer [carprobs]
Nov 11, 2011 (7:04 am)
This problem is caused by an Electrically Operated Temp/Blend door that is controlled by the Tempature dial on LT models with "Auto Climate Control". (If yours has a temp control dial with numbers from 65 to 85) Anyway this door is controlled by an electric motor that opens and closes the door to vary the temperature. This motor Is called the Heater & A/C Blend Door Actuator. Its Part Number is (Dorman 604-106) This motor can be replaced by dropping down the Glove Box, and reaching through. Its right on top of the heater box. The motor is expensive - around $100 - $120. That should fix your problem.
Scott - ASE Master Mechanic