air conditioner is not working?

check to see if your mode actuator an d other actuators are getting vacuum when dialed to that position they are under dash see pic of mode actuator. also check for a vacuum leak start at engine.

This guide can help fix it

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

Please run down this guide and report back.

2003 Blazer, the A/C went out on it a few days ago & yesterday i had it on defrost only & tempeture on cool & the A/C came on, i switched it to A/C & it stayed on for a while & then went off, it will come on every now & then but not real cool only sometimes. any ideas.

Without putting a set of gauges on it to read the high and low side pressure readings, it would be a guess, more than likely it could just be low on charge.

i've had it charged, would being low o charge still have anything to do with the A/C coming on on defrost?

The compressor will run when in defrost mode, that is the way the system is suppose to operate. But like I said, I would have to know the pressure readings to properly help you diagnose your problem.

thanks a lot i'll have this checked out, you've been very helpful.

my heater blows hot air but will only blow thru the top vents it will not blow at floor level. Checked the switch, it works fine. Any ideas what could be causing this? Also replaced thermastat

Sounds like you may have a vacuum leak, possible faulty vacuum hose on the controller behind your dash which open and close the door to direct the air flow.

Your welcome, thanks for using 2carpros.

was cold and went warm.checked all fuses all ok.pulley cycles ok.purchased recharge kit and it registers @ 100psi.

how much freon did you put in. what does the low side read when it is running. does the compressure cycle or does it stay engauged all the time when running.

Air Conditioning problem
2000 Chevy Blazer 4 cyl Wheel Drive Type unknown Automatic 75000 miles
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When I turn on AC - a foul smell is noticeable - what could this be coming from?

you either have a leaking heater core or a mouse made a nest in your heater. do you notice antifreeze on the ground?

Perhaps I noticed a little antifreeze - I also did notice
that when the air was turned on there was a little
smoke --- not smoke but like vapor for just a second.

When I turned on my defroster - it did not seem to work like it should -

YUP DEFINATELY A BAD HEATER CORE

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?
where would the relays for the a/c be?

[quote:b5cb79dca3="rdteem"]Air Conditioning problem
2000 Chevy Blazer 6 cyl Four Wheel Drive Automatic 106000 miles
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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?
where would the relays for the a/c be?[/quote:b5cb79dca3]

Have you had the freon checked? Low freon will cause the clutch to cycle in and out every few seconds or so.

freon is good. It is completely charged. do you know where the relay is and if ti could possibly be that.

Not exactly sure which one it is, but the relay is in the underhood power distribution box. There should be a diagram of the fuse and relay location on the inside top. You may also want to check the Cycling Switch. It is usually located on the Accumulator but can be located in the line somewere...... Here is what the Switch looks like....

Here is the Accumulator....

I have a 2000 Chevy Blazer and while driving to work one morning, the air conditioner stopped working, the dash guages quit, no wipers, and I couldn't hear the engine cooling fan running. Any suggestions?

this is kind of har d to give an answer, it could be a fusible link or big fuse has burnt out. the larger fuses are in the undrhood electrical center. It could also be a bad battery or a bad ground. really a pro should look at this to give a proper diagnosis.

My air conditioner does not blow cold air, no matter the temperature outside.

[quote:1f3721babb="kaye"]Air Conditioning problem
2000 Chevy Blazer 6 cyl Four Wheel Drive Automatic 96000 miles
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My air conditioner does not blow cold air, no matter the temperature outside.[/quote:1f3721babb]


Does your A/C Compressor kick in and out every few seconds? If so you are most likely low on freon...

If the A/C Compressor doesn't kick in at all then check your fuses and relays.

Post reply and results here.....

Air Conditioning problem
2000 Chevy Blazer 6 cyl Four Wheel Drive

how to add refrigerant to system

without a bottle of r-134a, and a set of manifold gauges, its cheaper to bring it to a garage, and let them evac, and recharge to proper pressure... they will set a vacuum which removes all moisture from the system, and then drain old oil, and replace with new pag oil, and also a UV dye... they also charge your system to manufacture specifications.... its worth the money.