AC Compressor Switches (Page 7/7)
RWDPLZ AUG 24, 10:11 AM
88TTops AUG 24, 05:50 PM

quote
Originally posted by RWDPLZ:

That metal machined surface behind the snap ring is a plug, it isn't part of the compressor body, you use a pair of pliers to remove it. Then the switch will slide right in.



I will try this tomorrow, I dont have that plug looking thing as you can see in the picture, but I maybe wrong as this is my first attempt at tackling any sort of air conditioner project. I spent most of my day today putting on Mr.Mikes seats, and man he makes it look easy!
88TTops AUG 25, 11:02 PM

quote
Originally posted by 88TTops:


I will try this tomorrow, I dont have that plug looking thing as you can see in the picture, but I maybe wrong as this is my first attempt at tackling any sort of air conditioner project. I spent most of my day today putting on Mr.Mikes seats, and man he makes it look easy!



As you were right again RWD, those were pressure testing plugs! With a bit of effort they came right out. I feel like an ass as I am very inclined with mechanics, but I have never touched an A/C system before. The right switches I returned two times now are right lol! :-) now I feel really dumb! Thanks for all the help guys!
fierosound AUG 26, 06:03 PM
On the 84 Fiero Your "low" side connection was on the A/C drier up front.
The "hi" side connector was on the A/C line from the compressor in the engine bay near driver's side decklid hinge.
That's a real nuisance connecting lines to an A/C gauge set.

It appears AC Delco made a retrofit kit to provide a connection up front on the tube upstream of the orifice valve.
You clamp it on and use a tool provided to pierce the aluminum tube, then install the Schrader valve.
I saw this part on RockAuto listed under A/C parts for 84 Fiero...



This is the comparison the the 84 (left) and later year A/C lines from condenser to evaporator.
The line from the condenser up front to the evaporator are interchangeable.
https://www.fiero.nl/forum/...160323-2-123621.html



[This message has been edited by fierosound (edited 09-20-2023).]

88TTops SEP 20, 08:01 PM
So I have rebuilt my ac, I am having massive problems with crushing the schrader valve on the low pressure side. I have all 3 parts available for the quick connect. They all keep crushing when the manifold quick connect goes in. So could I take out the schrader in the accumulator and just use the valve in the quick connect? I have been through 4 and keep having the same problem.
RWDPLZ SEP 20, 09:08 PM

quote
Originally posted by 88TTops:

So I have rebuilt my ac, I am having massive problems with crushing the schrader valve on the low pressure side. I have all 3 parts available for the quick connect. They all keep crushing when the manifold quick connect goes in. So could I take out the schrader in the accumulator and just use the valve in the quick connect? I have been through 4 and keep having the same problem.



When you install the new low side adapter fitting on the accumulator, you first remove the schrader valve from the accumulator. The adapter has its own schrader valve. The adapter is a one-time use and seals to the accumulator's threads. If you need to replace the accumulator in the future, you'll need to buy another low side adapter fitting.

https://www.4s.com/en/ecata...9976&type=p&search=s

Four Seasons part number 59976

[This message has been edited by RWDPLZ (edited 09-20-2023).]

fierosound SEP 20, 10:26 PM

quote
Originally posted by RWDPLZ:

The adapter is a one-time use and seals to the accumulator's threads. If you need to replace the accumulator in the future, you'll need to buy another low side adapter fitting.




I'm sure this is something most of us didn't know. (filed in memory for future use)

What about the switch on the accumulator? It appears to be plastic threads in it.

[This message has been edited by fierosound (edited 09-21-2023).]

RWDPLZ SEP 21, 02:05 PM

quote
Originally posted by fierosound:

What about the switch on the accumulator? It appears to be plastic threads in it.




No, the cycling switch comes off and on as needed, the accumulator port it's attached to has a schrader valve that is left in place, the switch has a little nub inside it that presses in on and opens the schrader valve so it can directly measure the pressure in the system, and is sealed by the recessed o-ring in the switch.
88TTops SEP 22, 10:08 AM

quote
Originally posted by fierosound:


I'm sure this is something most of us didn't know. (filed in memory for future use)

What about the switch on the accumulator? It appears to be plastic threads in it.




Thank you for all your answers. I had no idea I was supposed to do that first. I just assumed that they work in unison together. As i said in my previous messages this is my first go through on any sort of air conditioning work. Thanks for all your help!