I have a 1997 Jeep Cherokee Sport and I want to recharge the A/C since it just blows warm air now. I bought an Interdynamics "Big Chill" can and hook it up to the low pressure valve. I check the gauge and when the compressor is NOT running it reads almost 70psi, but when the compressor is on it reads about 15-20psi.
Should I be reading the gauge when the compressor is on or off? I don't want to overcharge it.
2007-08-10 11:07:57 · 4 answers · asked by Yoi_55 7 in Cars & Transportation ➔ Maintenance & Repairs
To charge an AC unit the compressor has to be running, because you are charging from the low side of the system.
Your charge should be around 35-45 psi.
2007-08-10 13:45:00 · answer #1 · answered by Albert F 5 · 0⤊ 0⤋
Do your gauges have a intense section and a low section, with rapid connect couplers? if so, make optimistic the intense is closed on the guages, yet open on the hose, so which you would be able to get a examining, yet no longer enable intense section to low section leak. The low section could be open on the hose and gauges. examine to ascertain if the intense section is at approximately a hundred and fifty psi, i'm undecided with regard to the real score for passanger automobiles. What length r134a bottle did you get? One from a piece's shop that approximately 12 oz., or an business one which's 35 lbs? The 12 oz..can is long gone in some seconds because of the suction of the compressor. If that doesn't help any, in simple terms publish extra suggestion.
2016-12-30 08:48:31 · answer #2 · answered by ? 3 · 0⤊ 0⤋
I tried the same thing with my Jeep and it didn't work with the can, no matter how we tried to get the gauge to match. My mechanic said that the can only works 40% of the time. It might be less of a hassle to pay the $30 to get it professional recharged. It lasts much longer and is well worth it.
2007-08-10 11:17:59 · answer #3 · answered by KerbyM 3 · 0⤊ 0⤋
Charge it just until the sight glass clears of bubbles. About 30 psi.
2007-08-10 11:18:10 · answer #4 · answered by Jody D 6 · 0⤊ 0⤋