Ac Not Working HELP - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 06-07-2005, 10:31 PM   #11
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yeah its engaging, i think my father might have overcharged it, what does that do
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Old 06-07-2005, 10:48 PM   #12
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I'm certainly not an AC tech but I believe LakevilleSSEi is.

My guess is if it is in fact overcharged, the high pressure cutoff switch is preventing the compressor from kicking in. I cetainly wouldn't take this as fact cause you don't really know if it is overcharged.

Why did you add refrigerant in the first place? Cause you thought it was low or empty? that would normally indicate a leak.

Someone please correct me if Lakeville isn't the cretified AC tech. A PM should be sent to him to this thread.
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Old 06-07-2005, 10:52 PM   #13
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Well i added Refrigerant because my AC was not blowing warm air. There may be a leak but i dont know right now. When i checked the gauges i got barely a reading so i added refrigerant then it didnt work, I let it out then added it again and it still didnt work. Once i put it in the pressure would jump up immediately, I thought it took alittle more than that for the pressure to go up.

The AC compressor is kicking in but i dont know if it is working
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Old 06-07-2005, 11:01 PM   #14
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I sent a PM to Lakeville and he'* currently logged on.

Stand by
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Old 06-07-2005, 11:21 PM   #15
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Quote:
Originally Posted by amato
Well i added Refrigerant because my AC was not blowing warm air. There may be a leak but i dont know right now. When i checked the gauges i got barely a reading so i added refrigerant then it didnt work, I let it out then added it again and it still didnt work. Once i put it in the pressure would jump up immediately, I thought it took alittle more than that for the pressure to go up.

The AC compressor is kicking in but i dont know if it is working
Just to be sure...You added R-134a right?

I don't even think you can get R-12 anymore. But ya never know...some people have it laying around still.

It'* going to read high when you're charging until the compressor starts cycling...then that should be your true system pressure. How much did you put in? IIRC it'* like 2.2lbs is what these cars require. At least on my 95. If I were you....Buy a leak dye kit for it. I got mine at the local parts store....Comes with a lil UV light and everything. Best to do that in the evening and then shine the UV light around and look for leaks. Also I would check and see how bad the face of your condensor is, and make sure none of the tubes are junk in the middle.

Do you get any condensation when the A/C is on full blast at 60*?
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Old 06-07-2005, 11:30 PM   #16
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Does the temp sensor in the Intake Manifold have anything to do with this? I was told by a local shop that is the reason why my AC and Cooling fans don't work. To check the sensor I was told to ground the plug directly to the block and if the cooling fans come on the sensor is bad) -I'm wondering about this since I have no CE codes.
I checked the pressure on the Lesabre and it'* right at 2 lbs pressure (has been converted to R134a).

I'm going to be working on this Thursday since I have a 4-day weekend and if I figure anything out I'll fill you in on the results.
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Old 06-07-2005, 11:39 PM   #17
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yeah im sure i put in 134a. I charged it while the ac was on full blast and put it in. I dont think i used that much, i think we only used 1 can. Thats one of the reasons we were confused, My dad used to do HVAC so he knew it had to be around 2 pounds.

I get no condensation at all, the pipes are not even cold.
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Old 06-07-2005, 11:46 PM   #18
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Quote:
Originally Posted by amato
yeah im sure i put in 134a. I charged it while the ac was on full blast and put it in. I dont think i used that much, i think we only used 1 can. Thats one of the reasons we were confused, My dad used to do HVAC so he knew it had to be around 2 pounds.

I get no condensation at all, the pipes are not even cold.
Did you rev te engine a little to get the compressor spinning faster? If I remember correctly when loading the system you are supposed to rev the engine. Could be a myth though.
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Old 06-07-2005, 11:47 PM   #19
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nope, no reving at all. I just let the engine run while me and my dad tried to get this damn thing to work
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Old 06-08-2005, 12:39 AM   #20
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U need to rev it other wise you're gonna be there a while because the refridgerant needs to get ciruculated through the system to get an accurate charge. Also you're gonna have high pressure when the compressors not cycling because you're pumping the refridgerant into the system but it fills up the line and then has no where to go until it get'* cycled by the compressor. Revving the engine will speed up the process. Is the temp on your display flashing at all? I don't remember if that question had been answered or not?

What I would do at this point is get to a parts store and pic up the leak dye kit.....Check for leaks...if there'* no leaks, then we can start trouble shooting components.
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