ac charging
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Fleet Owner
Joined: Aug 2004
Posts: 20,419
Likes: 197
From: AZ
ac charging
Can someone refresh my memory of how to jump start the ac compressor? I had to replace a hose then I vacuumed the system. So, starting out I remember having to use a paper clip to jump the compressor into action to get the system to draw in Freon. How do you do that?? Thanks
Tuned
Joined: Mar 2019
Posts: 322
Likes: 34
From: Northern Utah
Yup. What hit man said. I read 2 pounds 6 ounces if completely empty. Basically 2 cans of 134 and a can of oil. Or, 2 1/2 cans. I start the gas going then jump the switch wire. Once you get a can or so in the switch will work like it should.
Hotshot
Joined: Dec 2005
Posts: 14,377
Likes: 609
From: evansville in
When you hook the can up it should provide enough pressure to activate the low side switch. It may cycle a few times while filling but no big worry.
yea oil will be in the various components,just jack it up and enjoy the cold.
yea oil will be in the various components,just jack it up and enjoy the cold.
i ain't rite
Joined: Mar 2005
Posts: 65,562
Likes: 5,599
From: Marlboro Mental Hospital.
agreed. pull vacuum, and charge. no need to jump anything. the first can will put enough in to get the low side cycling, then the second can will suck in as the compressor turns on.
by the time you get to the third can the compressor should stay running.
134 cans are only 12 ounces, so you need 3 cans for the 38 ounce system.
by the time you get to the third can the compressor should stay running.
134 cans are only 12 ounces, so you need 3 cans for the 38 ounce system.
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Fleet Owner
Joined: Aug 2004
Posts: 20,419
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From: AZ
Thanks Tom and everybody else. I'm pretty cool for an old guy now, lol.
On a side note while I had the gauges etc out I checked out my old 1998 VW Beetle. Cooling lately has been intermittent so I found out that the high side is over 400! Low side is normal but google said its either overcharged, blockage somewhere or the compressor is about shot. I can believe that the compressor might be on its way out, its had a very hard life. First I'll try to get the pressure down, I don't think there is a blockage but I'm guessing a new compressor is in the future.
On a side note while I had the gauges etc out I checked out my old 1998 VW Beetle. Cooling lately has been intermittent so I found out that the high side is over 400! Low side is normal but google said its either overcharged, blockage somewhere or the compressor is about shot. I can believe that the compressor might be on its way out, its had a very hard life. First I'll try to get the pressure down, I don't think there is a blockage but I'm guessing a new compressor is in the future.
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i ain't rite
Joined: Mar 2005
Posts: 65,562
Likes: 5,599
From: Marlboro Mental Hospital.
with a high side of 400, i would be leery of standing close when running.
the rubber hoses tend to blow around 500 psi. (yes, i know this from experience)
i would bet there is crud in the system from a failing compressor blocking the orifice tube.
the rubber hoses tend to blow around 500 psi. (yes, i know this from experience)
i would bet there is crud in the system from a failing compressor blocking the orifice tube.
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Tuned
Joined: Feb 2009
Posts: 326
Likes: 15
From: near charlotte nc
before throwing parts at the VW look at cooling fans and condenser for trash on it can spray water on it to see if pressure drops a lot
in my experience when high goes way up low side drops a lot from a blockage, but low side stays up with poor cooling of condenser
in my experience when high goes way up low side drops a lot from a blockage, but low side stays up with poor cooling of condenser
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