I have 2002 caravan 3.3.Started having problems with a/c, one minute would blow cold then would blow hot.Seemed like the problem kept geting worse ,sometimes if i turned a/c on then off a couple times it would blow cold again, then process would repeat .Added 134a with cheap single gage ,said charge was fine,but still had same problem.Got a set of high and low side set of pressure gages , pressure tested both gages were in the red.Noticed compressor would constantly kick on and off,a/c blows cool not cold.When motor is idled up fast 134a blows onto the ground under compressor.Can anyone help?

 

post the gauge readings*.
did you use a sealer/stopleak r134a?

The system is dumping refridgerant? is that correct?

IF YES then thre is a restriction comp to evaporator....
BUT system should shut down....Is the CEL on ?

knowing front only or front and rear will hellp get info

* Sorry got to ask -both gauges in red? the valves on gauges are CLOSED?

 

high pressure side reading 125psi, low pressure side reads 80psi ,compressor steady kicks on and off.put stop leak r134a in would only take 1/3 of a can wouldnt take any more ,didnt add till right at end of these problems happening. yes system is dumping r134a.cel is not on,is front only.

 

I want to be sure we are on same page...those are the pressure with eng running?

 

yes with motor running,a/c on high.