Hi, the a/c on my 2000 chevy blazer is not working properly. It usually does not come on when i crank it up and sometimes will come on after i get going but shuts back off and on throughout the trip. I have replaced the clutch and it spins sometimes, what else could it be?
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Re: 2000 blazer a/c problems
You are leaving out a LOT of necessary information. When its not
working correctly, what are teh low and high-side refrigerant
pressures?Does it work some of the time, or is it intermittent? Need
more testing results.
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first you should make sure the fuelpump is working properly.you will hear a slight buzz when turning key on without cranking.if not its defective... happened to me with my 1996 blazer...if its good then check fuelfilter
Heater core sounds like it's bad. It's a big process to change and lengthy process to explain. Usually the dash will have to be removed. Is the car overheating or getting above normal. To give you a better understanding, try searching "heater core" this will explain what and how it works. Like i said it is sometimes a very lengthy job to replace.
It's most likely the "four wheel drive actuator" This is located on the front differential housing. It's cylindrical shaped and has a large hex (about
1-1/4") and two wires coming out of it. Usually they short out and blow the fuse but, I've also seen where they just quit working and sometimes they just get slow to work. The "actuator" has a heating element in it and it warms up, some sort gas, causing it to expand thus engaging the front wheels. In cold weather it may take a minute or so for it to engage, so put in four wheel drive and wait for a bit and see what happens.
you coul remove the # 1 plug wire (1st on drivers side) and see if your getting a spark. It may need a new distributer cap and rotor.or it just may need new spark plugs. fair warnig I am not a mechanic but have had similar problems like this that I have had to fix myself.
What about the fuel filter????? Have you changed it out??? If you can spary something like a started fluid, that means it is a fuel problem. My last check, it has to be above 50-psi on the fuel pressure to make it run right. I had 35psi, but whould not get over 30mph or down hill maybe 45mph. Check both filter & pressure, but check pressure with a New fule filter!!!!