hello i got a AC question. last summer when it was getting into the 90's i turned on the ac and it did not work. i had my climate control turned down to 60 on both sides, and it would blow warm/cooler air. i pushed the snow flake button and on my dash and the snowflake symbol with the slash through it light up on the dash. i looked under the hood at the ac condensor and it was cold but not producing much condensation. i bought one of those cheap recharge kits to see if that would work but it said it was full. what could this be? anyone have any ideas? i dont think the system needs recharged at 59k miles. oh and when it was about 80 or so out it would blow cooler air, almost cold.. whats going on here?

I had this happen to my truck. Took it to the dealer and they took care of it. Can't remember what the deal was.

Does the AC compressor cycle on and off? Probably not. Maybe the low pressue switch is loose or bad, that would cause the system to think there was no Freon and not start the compressor.

Good luck, let us know what ends up fixing it too.

Well, assuming all switches were where they were supposed to be for the a/c to blow cold air, it could be an airflow issue over the condensor. If you were driving at the time then that wouldn't be an issue...SO, I'd have the system pressure/leak checked.

im sure i heard the compressor kick on and off. and i was driveing around when i tired the ac. tried it numerous times in fact.. washed out the radiator and condensor. they were both clean. removed my lund grille guard ( its the bug one that still lets air through) and it still didnt work

I had the EXACT same thing happen to me last year. The dealership had to replace the compressor and recharge the system under my extended warranty.

If you did not buy the extended warranty, then I would do a search in the "For Sale" forum for the compressor. There was one for sale within the last month.

-Wardster

http://www.dieselplace.com/forum/showthread.php?t=71228&page=4&highlight=aurora

This is the thread. Check with him to see if he has something you might need.

-Wardster

just blowing smoke here....would the cab filter mess with you a/c if it's plugged???

there are no cab filters on my truck. or yours if im not mistaken. they ended that in 02

I had the EXACT same thing happen to me last year. The dealership had to replace the compressor and recharge the system under my extended warranty.

If you did not buy the extended warranty, then I would do a search in the "For Sale" forum for the compressor. There was one for sale within the last month.

-Wardster

man that stinks. they told me everything was good to go when i bought it. kinda hard to check that in the winter. couldn't be anything else??????

man that stinks. they told me everything was good to go when i bought it. kinda hard to check that in the winter. couldn't be anything else??????

My compressor would actually squeal every once in a while, since it apparantly had a bad bearing in it. Do you hear anything like that? Did you buy it from a GM dealership? If so, they may take a look at it for you considering the timeframe it was purchased.

-Wardster

i did hear a constant squeek about a month ago. changed the belt and it went away. i bought it last winter and didnt use the ac at all during the summer because i was gone! just tried it out the other day and it didnt work... doubt they will do anything for me.. mabye if i brought it up last summer..

ok tried it again yesterday. turned the knobs to 60 and hit the snowflake button. it came on with the slash through it. i drove around and tried it with that snowflake on and then off. the air got cool but not cold. i cycled through the floor, mid level and window options. when it got to the floor/window selection the snowflake wit hthe slash went away. but when you changed it to anything else it came back...i parked the truck and popped the hood. the ac lines were cold to the touch but no condensation on the ground. does this help? hope this is a sensor or something...

First off pushing the snow flake button and having the light come on with the slash thru it is actually turning the AC OFF, that's what the slash is for, so leave the light off to have the AC ON.

Second, try turning on your recirculate button in hot weather so that you only cool off the cabin air in the truck and you won't draw in any more warm air from the outside.

Third there was a problem with some trucks being over filled with freon and something about a reciever drier causing poor performance in hotter weather, like 90 deg plus.

I think there was a TSB about the overfill and drier or what ever part it was, and also some trucks have a diffrent compressor from the factory that could be causing problem's.

Do a search of AC not working, it was a hot topic last summer.

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thanks, that helped a lot. i got one more question. should i get a snowflake symbol if the ac is on? i dont get that on my display??

If you have the auto temp controls then you will NOT get a snowflake when the AC is on.

Just set the temp to 60 deg or what ever temp you want and hit the recirculate button if you want and the truck does the rest.

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If you have the auto temp controls then you will NOT get a snowflake when the AC is on.

??? I have a snowflake on my AC display when the AC is on. See page 3-29 of the owner's manual for more information.

yea i read that in the manual too. thought there was susposta be a snowflake when the ac was on...

just did some reading on a faulty compressor, and then something about the system being over charged. ill check into that and see what i come up with... anymore ideas??

I don't know about 2005 but my 03 manual says that you can turn on the ac and the manual shows a picture of a snowflake but none ever comes on the dispaly.

Only the snowflake with the slash thru it to tell you the ac is off.

Sometimes if it's cooler outside and I just want fresh air with no AC I'll set the temp to 60 and hit the ac button to turn it off and just get cool outside air thru the vents.

The manual dual climate control models have a AC button with a light in it that turns ON when you turn the AC on, but not in my auto climate control.

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I'll be the first to admit, I don't fully understand it. Remember years ago when all you did was slide the lever to AC, and the temperature lever all the way to the left to make it blow cool air?

I don't know about 2005 but my 03 manual says that you can turn on the ac and the manual shows a picture of a snowflake but none ever comes on the dispaly.

Only the snowflake with the slash thru it to tell you the ac is off.

Sometimes if it's cooler outside and I just want fresh air with no AC I'll set the temp to 60 and hit the ac button to turn it off and just get cool outside air thru the vents.

The manual dual climate control models have a AC button with a light in it that turns ON when you turn the AC on, but not in my auto climate control.

My "snowflake" stopped illuminating in my '03 and I didn't even know it. It wasn't until I had the control module replaced that I realized it had been missing. Not sure if that particular feature was faulty or they replaced it with the newer version??? All I know for sure is that whenever the A/C activates on my auto climate control, the snowflake appears.

:confuzeld

-Wardster

Well maybe my snowflake is broken too and I just don't know it since this is the way it's been working since day 1.

I'll have to check into it.

Thx for the info.

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ok so i took it to the dealer today and this is what they did. changed the ac compressor switch? and filled it up with .5lbs of r134. said wait till a hot day and check to see if that works. they charged me a total of 250$ i thought since there was a tsb out it would be a warrenty deal but i guess i was wrong. they also said my idler arm and pitman were going out. i just bought this damn thing a year ago from there. shouldnt they have caught that in their inspection? how hard is that to change out? thanks

There was a TSB for the 03 A/C. If all of your buttons and switches work have the dealer check the charge. I believe they even can do some computer point changes. T'was one of the first things I had to have done to mine. A/C works fine now.

i took the tsb into them and they did the service by changing out the ac compressor switch and recharging the system. they charged me like 230. oh well, thought they would cover it but they didnt.

ok so it got up to 90 the other day. i turned the ac on down to 60 and put it on auto with the recirculate on. its got coolder but didnt seem to get as cold as you guys were talking about. it wouldnt get cold enough that i would have to wear a sweatshirt or something. just cold enough to be comphy. i was a little disapointed. any suggestions?

also another day i was crusin down the interstate with it on low. i got off at the next exit and noticed the engine fan clutch had kicked on. my temp was around 196-198. stayed on for a bit till it cooled off. if this normal? thanks

??? I have a snowflake on my AC display when the AC is on. See page 3-29 of the owner's manual for more information.

I have the snowflake too. I used mine this weekend and while it kept it kind of cool, it was lame compared to the AC in both of my other trucks. Time to do some more reading.

Do a search of AC not working, it was a hot topic last summer.

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I did that and nothing came up. It said sorry no matches found. Anybody know where I can find more info on this topic? Thanks!

type in air conditioning not ac. i had the same problem searching

This might be crazy but my caddy did the same thing.the servo that controlled the dual climate controll was stuck. A quick Censored and i moved it by hand now the servo moves free and its working.Just a thought.Rember the flaps in the box are vac or elec feel around might be that simple

Also, there's an AC control module in the cab in the front pax floorboard area that goes out and needs to be changed. There is a post about it on it here somewhere.