Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 02-14-2017, 02:13 PM
Registered User
Join Date: Jan 2017
Posts: 72
A/C help

My AC is empty but I want to make sure everything works. I need to know how it works. Also the pressure switch has 4 wires/ terminals and I can only find two terminal switches online. Will the compressor clutch engage with no pressure in the system? I'm sorry I would post a pic but I haven't figured it out yet.

Reply With Quote
Old 02-14-2017, 03:10 PM
lsmalley's Avatar
Registered User
Join Date: Oct 2006
Location: California
Posts: 1,988
Just run 12v to the compressor to get it to engage. As far as your ac being empty, but you want to make sure everything works.....don't know how you plan on doing that with an empty system. If it's been empty for a while you might as well replace all the o-rings, expansion valve, the high/low pressure switches, and receiver drier. You can get all those parts for under $100 from Pelican. If you are unfamiliar with working on an ac unit, I would suggest reading up on it first and watch a few youtube videos on how to vacuum down the system, check for leaks, etc., etc.

1990 190E 2.6L
Reply With Quote
Old 02-15-2017, 08:46 AM
Registered User
Join Date: Jan 2017
Posts: 72
I ran 12v to the clutch and it's good, but what I'm having trouble with now is this pressure switch. Like I said before I can't find one that looks like it on eBay or any where else. It has 2 term at 12 o'clock and 2 at 3 o'clock. I don't know how I would go about converting it to the other style which I noticed has two sensors each with 2 terminals. I know how to work on AC systems the problem is finding replacement parts that match what I got. This is why I'm asking anyone if they know of different AC setups in there 123s. From what I was told from my father who bought the car new,. Was he had the ac system installed after it was bought. It is a European car but this was installed in the US. (Along with some emmision crap) I'm sure I could change over parts and sensors and make everything work but I'm trying not to create more problems. Any info would be appreciated.

Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 05:18 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page