Compressor NO GO. Please help get me started.
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Compressor NO GO. Please help get me started.
Its my first time here, I’m over from 73-78 trucks and need some help.
I needed a work rig so I can put my 78 4X4 on blocks for restoration so I purchased a 90 Ford E-150 Van, 302, automatic with factory air.
First prob……..When the dash lever is moved to AC the fan will blow but the compressor will not come on (engage clutch). I have searched this forum and found much info, which takes us to my second problem and the reason for this post.
Second prob……I have no experience with, and know little about AC other than its basic operation and a few part names and locations.
In a search here I have found the first thing that has been recommended by you experienced folks is to check fuses, done and all good. Second thing is to “jump” the pressure switch? If so, where is it, what does it look like, how do I do it and what are the hazards or risks? OR is there something else to try.
Any help with either of my problems would be very much appreciated.
PS I have what I think is a manifold gauge set. Two gauges on a manifold with two hoses, one red one green, hanging down.
Thanks
Craig
I needed a work rig so I can put my 78 4X4 on blocks for restoration so I purchased a 90 Ford E-150 Van, 302, automatic with factory air.
First prob……..When the dash lever is moved to AC the fan will blow but the compressor will not come on (engage clutch). I have searched this forum and found much info, which takes us to my second problem and the reason for this post.
Second prob……I have no experience with, and know little about AC other than its basic operation and a few part names and locations.
In a search here I have found the first thing that has been recommended by you experienced folks is to check fuses, done and all good. Second thing is to “jump” the pressure switch? If so, where is it, what does it look like, how do I do it and what are the hazards or risks? OR is there something else to try.
Any help with either of my problems would be very much appreciated.
PS I have what I think is a manifold gauge set. Two gauges on a manifold with two hoses, one red one green, hanging down.
Thanks
Craig
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Originally Posted by Ultramagdan
I would recommend putting the gauges on it to see if you have any freon before I would try and jump it.
Thanks for the come back.
Remember Im new to AC.
Where do I hook up the guages and what am I looking for?
What is good pressure and what is bad?
In the process of hooking up the guages is there anything to watch out for so as not to damage the system?
Note; I was mistaken when I described my guage set. In addition to the two hoses and guages there is a valve below each of the guages and a center hose that has a fitting on the top by the manifold. I got this thing as part of a "lot" at an auction and packed it away.
Thanks again
Post Fiend
Joined: Feb 2000
Posts: 11,496
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From: Kansas
You will need to hook your gauges up to the system. The red hose is for your high pressure side and connects to line coming from the receiver/dryer. The blue hose is for your low pressure line and connects to the line going to the compressor. The middle hose is for charging a system. Connect the hoses and read what the gauges say. Outside air temp is important since it will affect this static pressure reading. We are looking for at least 45 psi.
Most vehicles made after 1993 use R134A so the van was set up for R12. If the system has not been touched in 17 years I would expect it to be discharged and the low pressure switch will prevent the compressor from engaging
Most vehicles made after 1993 use R134A so the van was set up for R12. If the system has not been touched in 17 years I would expect it to be discharged and the low pressure switch will prevent the compressor from engaging
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I went to hook up the gauges and found out that the fittings on my set up are for HVAC and are larger than the automotive fittings on the truck. I will be back here when I find an adapter if available.
Hotshot
Joined: Jan 2004
Posts: 19,762
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From: St Louis
Do NOT use guages intended for residential/commercial applications with your vehicle due to the likelihood of cross-contamination of the refrigerents.
Get the proper set of guages.
Steve
Get the proper set of guages.
Steve
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Originally Posted by projectSHO89
Do NOT use guages intended for residential/commercial applications with your vehicle due to the likelihood of cross-contamination of the refrigerents.
Get the proper set of guages.
Steve
Get the proper set of guages.
Steve
Like I said this is a learning experience so because of info gleaned from my search here, I contacted the guy I bought the van from. He said he hadent turned the air on for some time but it worked the last tie he did.and according to him it was not converted from R12 to 134(?).
Steve, thanks for the warning, I think Ill bite the bullet and find a shop to check it out but before I do can I pull the plug at the pressure switch and check for power (test light). I assume one plug lead should be 12V with the AC switch on and engine running. I also assume that if the pressure switch were closed the power should go directly to the pump.
Sorry to be so **** but over the years Iv learned I often screw things up worse than they were before I charged in to fix em.
Thanks again
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Post Fiend
Joined: Feb 2000
Posts: 11,496
Likes: 6
From: Kansas
Originally Posted by Craigster1
Steve, thanks for the warning, I think Ill bite the bullet and find a shop to check it out but before I do can I pull the plug at the pressure switch and check for power (test light).
Thanks again