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Ac high pressure

Coldfusown on Thu June 24, 2010 10:31 PM User is offline

Year: 1991
Make: Dodge
Model: neon
Country of Origin: United States

Hey guys, my first post..I am not to well educated into AC systems to be blunt. Roommate has a Dodge neon that she has had since 93. Apparently, according to her, she has NEVER serviced the AC system. It stopped working years ago so she just stopped using it. Today she asks me to help her put in the coolant as I've done it to my rig fine several times, so I agree as it's usually quick. However, started the car and ran for 5 minutes with AC on max, located the low pressure line and hooked up service end of hose with gauge attached. You'd think after so long a time unserviced it would have a low pressure and reason for improper ac functioning. However, the pressure readings at their lowest was 55lbs and 100 at the highest. The AC would click off and on frequently which I've heard can be normal. Basically, the pressure stays around 100, the compressor/condenser? clicks and it'll drop back down to 55 for under a minute and cycle back and forth. This is suggesting that the level is too high or mechanical failure of some sort. Is it possible for the coolant levels to be so high after so long of no use? Or perhaps I should try and bleed some off and go from there. I've read that I should check to see if the clutch is engaging/disengaging, so is that "click" and the change in motor rpm an indicator of that? The pulley and such are attached and functioning. Sorry for my idiot idiot remarks I am sure, but just hoping for a little guidance ^_^

Pressure: 55-100
Outside Temp: 80
Car blows semi cold air, intermittently

TRB on Thu June 24, 2010 11:48 PM User is offlineView users profile

Sorry to say but first of the Walmart charge kit is no way to determine what the system is doing. Sounds like the system is full on refrigerant unless you added refrigerant to a full system. This could be cycling early for many reasons. Poor air flow being one. You really need a proper set of gauges on it so both the low and high side readings can be taken.

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Coldfusown on Fri June 25, 2010 12:38 AM User is offline

I added nothing as the pressure is too high. I am not a total idiot, just ignorant to the mechanics of AC systems Being it is their vehicle and not mine, I'll just do the right thing and suggest they take it to a licensed individual. If it was my car I'd tear it apart and learn as I go hah.

TRB on Fri June 25, 2010 10:53 AM User is offlineView users profile

Did not say you were an idiot! You can't claim the pressure is to high by a low side reading with a walmart gauge. Not trying to be disrespectful but that is the fact. If you don't have the proper equipment it's best not to mess with it. Autozone will rent you a rent set of gauges. You stated you have filled a few systems now. If this is the case might be time to invest in a real set of gauges so you can at least get the full picture when adding refrigerant.

-------------------------

When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
Contact: ACKits.com


Edited: Fri June 25, 2010 at 10:54 AM by TRB

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