Automotive Air Conditioning Information Forum

Assuming a completely vacuumed system. About how long should it take to draw in a 12oz can?

Last 2 times I have tried it seems to take quite a while. I did not time it but it seems to take 20-30 minutes.

Just a follow-up on this topic, for future user reference.

I evac'd the system added another 0.5oz of oil on top of the approx. 4.5oz I already added. I say approx. because I had a slight spill when trying some dumb youtubers method of adding half to the evaporator (duh, its just going to dribble ...

How much mileage has this vehicle logged?

212,000 miles

If your recollection is correct, and with a low side of 40-50 PSI, the evaporator temperature will be at least 45°F and even higher, much too warm for any measurable cooling. The high side at around 190 PSI is about right for a 75-80°F ...

Ok, got back out to the vehicle. With the gauges unhooked and all valves wide open the low side reads at about +3-4psi. Put the gauges back on.the vehicle and checked the pressures.

Vehicle off, not ran at all today 78 both sides. 72 degrees F.

When I started the car I got a slightly different ...

A stuck or sticky expansion valve? Or the dryer has has come apart and the absorption pellets have clogged up the system?

I dont have the car in front of me at the moment. But immediately before the issue they were within range while running, AC on. What I recall is like 40-50 low side and around 190ish high side. 75-80 degrees out.

Vehicle is an 09 grand cherokee. With a kind of unknown AC past. The owner knows ...

AC blows cold at start up, after running for about 5 minutes the compressor seems to be slipping on the clutch.

I ordered a smart VOV orifice tube and installed it with a system rebuild on a 93 Cadillac Fleetwood. After doing a little reading it appears that they sent me the extreme heat version intended for use in desert environments. I am in the muggy Ohio valley. The system seems to cycle more than normal ...