1980 A/C advice
Thread Starter
Instructor
Joined: Jul 2007
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From: Price Utah
1980 A/C advice
I have a 1980 model in really nice shape except for the a/c. I live in Utah so this would be a real asset for most of the year.
1. Compressor won't kick in unless pressure switch is jumped and then has a bad rattling type sound.
2. No air from a/c vents unless vacuum is applied to the black and tan
hose on the console switch. I did this with a brake bleeder hand pump and
the door would open to allow vent air but would not stay in that position
with the normal a/c switch vacuum.
Any ideas or suggestions are appreciated. I am also considering aftermarket air such as vintage or hot rod air if anyone has experience with these systems
Many thanks
J Bowles
1. Compressor won't kick in unless pressure switch is jumped and then has a bad rattling type sound.
2. No air from a/c vents unless vacuum is applied to the black and tan
hose on the console switch. I did this with a brake bleeder hand pump and
the door would open to allow vent air but would not stay in that position
with the normal a/c switch vacuum.
Any ideas or suggestions are appreciated. I am also considering aftermarket air such as vintage or hot rod air if anyone has experience with these systems
Many thanks
J Bowles
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
Your low on freon(134) on your first question.
On the second its probably the vacuum valve in the console that fell apart.You can put it back together with a bolt or rivet.I still have a handful of the original push in retainers.Here is the valve.
http://www.ecklers.com/product.asp?p...6&dept_id=1193
On the second its probably the vacuum valve in the console that fell apart.You can put it back together with a bolt or rivet.I still have a handful of the original push in retainers.Here is the valve.
http://www.ecklers.com/product.asp?p...6&dept_id=1193
Thread Starter
Instructor
Joined: Jul 2007
Posts: 228
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From: Price Utah
console switch
I replaced the console switch with a (new?) one from an ebay vendor
and all the other doors seem to function as required. Could still be in the switch though I cant detect any leaks from that area.
and all the other doors seem to function as required. Could still be in the switch though I cant detect any leaks from that area.
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
Sounds like you have no vacuum coming in to the switch from the engine.The all black hose on port #1 on the vac.switch is the vac. coming in.Pull the 5 port connector off with the engine running and see if you have vac. coming in on port #1
Thread Starter
Instructor
Joined: Jul 2007
Posts: 228
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From: Price Utah
vacuum to switch
Thanks for all the suggestions
Yes there is vacuum coming in to the switch; about 15 on the gauge.
The door on the drivers side on the heat a/c box works on switch command. If I remember right it sends air to the defroster and the kick pad
door works as well. It just doesn't seem to want to make the a/c vents work with the available vacuum at the switch. As I went through the trouble shooting process I could make it work by using a hand vacuum pump ( the type sold for bleeding brakes)
Yes there is vacuum coming in to the switch; about 15 on the gauge.
The door on the drivers side on the heat a/c box works on switch command. If I remember right it sends air to the defroster and the kick pad
door works as well. It just doesn't seem to want to make the a/c vents work with the available vacuum at the switch. As I went through the trouble shooting process I could make it work by using a hand vacuum pump ( the type sold for bleeding brakes)
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
Thanks for all the suggestions
Yes there is vacuum coming in to the switch; about 15 on the gauge.
The door on the drivers side on the heat a/c box works on switch command. If I remember right it sends air to the defroster and the kick pad
door works as well. It just doesn't seem to want to make the a/c vents work with the available vacuum at the switch. As I went through the trouble shooting process I could make it work by using a hand vacuum pump ( the type sold for bleeding brakes)
Yes there is vacuum coming in to the switch; about 15 on the gauge.
The door on the drivers side on the heat a/c box works on switch command. If I remember right it sends air to the defroster and the kick pad
door works as well. It just doesn't seem to want to make the a/c vents work with the available vacuum at the switch. As I went through the trouble shooting process I could make it work by using a hand vacuum pump ( the type sold for bleeding brakes)
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
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Thread Starter
Instructor
Joined: Jul 2007
Posts: 228
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From: Price Utah
vacuum problem solved
Thanks for the hints on checking vacuum. I found a broken hose that was repaired with too big a hose slipped over it. Replaced with proper size patch and presto air to the vents. Now to get the r12 charge checked.
Instructor
Joined: Dec 2006
Posts: 109
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From: Las Vegas Nevada
Just been lurking on this thread & wanted to thank DWncchs on the great advice. Also thanks jbowles49 for posting. Now I might actually get around to fixing the same problem. The vent problem has been that way for a long time. But, As I say "Never do something right now, when you can keep putting it off". Thanks again.
