Air conditioner not working correctly?

Hi,

I recently made a mistake, while changing out my radiator, of loosening an Air Conditioning high pressure line. Some of the freon (or whatever you call it these days) leaked out. I was able to re-tighten the fitting, and so I don't think I completely emptied the coolant.

Since, I have noticed anytime I put on the defrost or AC, I can hear the compressor kick on, make a small "hiss" for 3 seconds or so, then kick off. And then repeat in an eerie melody for as long as the AC or defrost is on.

I've purchased a re-fill can from Walmart with a guage on it. Up until now, I've been assuming that it's due to low (or extremely low) levels of coolant in the AC system. When I put the guage on (with the AC on Max as instructed), the guage fluctuates in rythm from 0 psi up to about 50-60 psi in that 3 second "hiss" time. (On the can, the needle reaches the yellow or orange. And says do not add - have someone inspect the system.)

I'm assuming this is the AC system trying to pressurize, then realizing there is no flow (due to low coolant), and shutting off the compressor.

Is my assumtion right? I would have expected to simply see low pressure, not ramping pressure that drops and re-ramps in repetative fashion. I don't want to add more coolant to the system if that's not the problem, but I don't know what else to make of the guage reading. If anyone could help, I'd appreciate it.

I have a 2000 Dodge Durango. The air conditioner stopped working. Water drips from the ceiling air vents. I would like to have it repaired or repair it myself. I am a reasonable mechanic. Please try to diagnose my problem. What parts I need. Where to find a schematic. Average prices for the parts or outside repair. Where can I purchase the parts. I will certainly donate. Please advise of average donation and how I can srnd a donation. Thank you

To respond: Even if car is shut down overnight it still only emits warm or hot air. The liquid that drips from the vents seems to be only water. It is clear, colorless, odorless and does not leave stains on hard or soft surfaces upon drying up. If you wish I can run a ph for acid/alkalinity. Please advise. One of my friends said it could be something wrong with with a part called an evaporator but he too is not really knowledgeable with automotive airconditioners. Please advise on this as well. Thanks, Richard

Air Conditioning problem
2000 Dodge Durango V8 Two Wheel Drive Automatic

I am having problems with my dodge durango. My a/c is only blowing hot air. We put in freeon and it works for about 3 days and then it starts blowing hot air again. We cannot find any leak when we put a leak detector. We have changed the hoses and the compressor. We have taken it to a dealer and they cannot find a leak either. Can you tell me whats wrong with my truck.

Yes the compressor still works.

We changed a/c receiver/dryer and it is still doing the same thing. It keeps blowing hot air even though we filled it up with freeon.

Where can I find the blend air door?

Last year I took my truck to get service for the heat and AC, as for the heat it works Fine, and The Ac was working with no problem when we received the truck back, However the care was service in February so there was no need to put the AC on until it got hot. Well needless to say it got and when I went to turn the AC on, it blows Hot air. Do You think this could be a serious expensive problem or something minor? Oh I've tried antifreeze also but that didnt help.

Air Conditioning problem
1999 Dodge Durango

when at idle a/c runs when driving it goes off on high pressure what could be causing that?

I have a 1999 Dodge Durango 5.2 litter 4x4 with approx. 125,000 miles. Recently the air condition stopped working it just blew out hot air. I know alittle about mechanics so the first thing I thought was the coolant level, I tested the level and it read an extremely high 125 psi. The fuse in my distribution box marked horn/AC is blown. The ac clutch relay is fine. I replace the fuse and as soon as you click the ac on it blows the fuse. I jumped the wire harness directly to the ac clutch and it clicks so the unit itself is fine. Do you have any suggestions. Thank you.