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posting here since it doesn’t look like I have the ability to post in the main form area. But I wanted to put this together in hope that they could help someone if they do searching. I recently bought a 1988 2 owner Conquest with 36k miles. All stock/no mods/seemingly almost all original parts. Great shape. But AC was nonfunctional. I immediately noticed that my compressor was not turning on regardless of any setting. I started by finding the dual pressure switch for the HVAC system. that is the switch with two prongs that is located just to the right of the accumulator dryer behind the passenger side headlight area as you are standing on front of the car facing the engine. This switch sits below another switch that has wires built-in. After unplugging the dual pressure switch,I used a jumper wire on the wiring harness to bypass that switch as a test. Lo and behold, the compressor turned on with the jumper wire in place. GetLanguage Courses after much research, I ordered the following replacement switch: Santech MT0227. in order to replace that switch, the system must first be evacuated of any refrigerant that is within the system. please ensure this is done in the proper manner. some local mechanics will actually evacuate your system for you for free. after the system is evacuated, it’s fairly straightforward to remove the old switch and replace with the new switch. At this point I rented guages and a vacuum machine from advance auto to fully vacuum the hvac system. I also ordered a new dryer. This is the one that I ordered from Amazon: UAC-RD 1149C. i first installed the new drier. Then I did a full vacuum for one hour to remove any moisture that was in the system. (This is a critical step and should be done anytime. Your AC system has been open to the air.). After the vacuum, I closed the blue valve on the guages completely and let everything sit connected for 30 minutes. I then checked the blue gauge to ensure that it was still holding vacuum. It was still holding vacuum, which meant I had no leaks within the system. this particular car had never been upgraded or retrofitted rather to r 134. But rather it still had r 12 when I bought it. keep in mind that our 12 had been removed from the system as part of my troubleshooting and repair work. so while there was no R 12 in it, there was still oil in the system that was compatible with r 12 and not r 134. Finding r 12 is near impossible and when you do, it can be super expensive. And doing a complete and proper change over to r 134 meant swapping out all O-rings in the system, draining the compressor oil and possibly other steps that I was trying to avoid. so after reading more, I opted to go with Redtek refrigerant which is compatible with systems that had r 12. Ordered two cans of refrigerant (6 ozs each) and one can of their oil (3ozs). At this point, I simply followed the basic common instructions on how to add refrigerant and replacement oil into an AC system. Note: for Redtek refrigerant, you use much less refrigerant than you would R134 or R 12. 12.2 ounces is all you need. I ended up using the full 3oz of oil (which also has some amount of refrigerant within that can),and about 8ozs total of Redtek refrigerant. Basically one full can of refrigerant, one full can of oil, and about a half of a another can of refrigerant. my compressor actually kicked on after adding just the 3 ounces of the oil/refrigerant within that can.) At that point, my low pressure was about 39 on the blue gauge which is the recommended psi. And the air coming out of the vent inside the car was cold again. So at that point, I stopped adding any more refrigerant. *EDIT: UPDATE: Read my subsequent post in this thread. 3 ozs of oil is FAR too much. and that is how I fixed my AC without having to do a complete R134 changeover. oh: almost forgot: I did change the low and high-pressure ports on the compressor to quick connects. For the low pressure port on the compressor, any of the ac gauge kits sold on Amazon include the proper quick connect fitting for the low side. But the high-pressure connector on my 88 conquest was a smaller diameter than what any of the kits included. UpgradeBathroom Faucets UpgradeBathroom Faucets so, had to order this for the low side from Nostalgic AC parts R-12 to R-134a Adapter High Side 3/16" × 1

Hello, We have a 89 Conquest. The AC compressor is not kicking on. The Auto button light is also not coming on as well, so i'm guessing these are related. Any help is appreciated. Thanks

AC Pusher fan relay wire colors please. I don't have Ac have not had AC in years. Trying to help a friend that has AC The Pusher fan does not come on when AC is turned on. Thought it should. The fan works fine directly connected. It just does not come on when AC is on. Like to jumper the delay to see if it triggers it to come on I just don't know what wire to jump. The AC works fine besides the front Pusher fan.

EDIT Bought another car, no longer shopping.

Is there somewhere I can get a new digital HVAC control head? The metal flake is wearing off. Also on the steering wheel radio controls.... --or-- Does anybody know what the process is called to paste metal? I recall seeing on tv once a process for crafts where they took paper thin sheets of metal and used a paste to adhere it to something. I had a buddy in high school that was a jeweler and also remember seeing him do something like that. Any ideas would be greatly appreciated. I wanted to post this in the restoration section but i guess my postings are too low in number. http://i370.photobucket.com/albums/oo141/koulbreeze/IMG_20111129_100319.jpg http://i370.photobucket.com/albums/oo141/koulbreeze/IMG_20111129_100310.jpg