A/C Issue
Hello everyone!!
Just a brief note to request some advice from you guys. Again, my w123 is giving me a hard time... You know how old cars are, they behave properly for some months. Suddenly they start messing around with you. Later they behave again.... Its like having another girlfriend.... :D Anyway, after having an awful new year (someone busted my windshield with a rock in the highway, massive oil leak in the steering box, minor brakes issue), my loved TAKA-TAKA (that's how I call my car because of the way it sounds) is still messing around with me.... Yesterday I noticed my A/C is not working so today I woke up early to have a look at it. Everything works when I turn the system on, except the compressor. I checked it, and its working properly if I connect it directly to the battery. For some reason the A/C control is not sending the signal to the compressor to start. Any clue to find the reason of the failure? I have the euro style A/C, with knobs for the blower speed and the heating, and a wheel for the A/C temp. Thanks! |
I couldn't advise you until I find out if your AC system is fully charged with refrigerant!:book: If it isn't, then the system pressure cutout switch is doing it's job and a recharge will fix this!:D
|
Are you keeping the model and year a secret for some reason ?
Are you using R12 or R134 or something else ? |
You're right about that! I'll ask a friend to check that for me... Maybe its that.
The weird thing is that the A/C was working perfectly (ice cubes coming out the vents) on december 24, when I got my windshield busted. The day before yesterday I installed the new windshield and yesterday when I took the car out for a little commuting I noticed the A/C didn't work. Seems weird because a two week break is not such a long time to cause the leak.... |
Sorry for the model/year secret, I forgot to mention it... :rolleyes:
It's a 1982 300D NA Euro, with a 4-speed manual. I'm not sure if r-12 or r-134... I'll check and I let you know. Thanks and drive safely! |
If you have a leak it would be wrong to just fill it up and let it continue to leak...
|
I'll check the system this afternoon to see if there is gas in it.
In case the gas is ok and there are no leaks, can anyone provide me a wiring diagram for the A/C system please. Thanks! |
The topmost switch on your AC Receiver/Drier is the pressure switch...if you jump that and your compressor clutch engages....it is most probably a lack of refrigerant......disconnect your jumper, and leave one of the wires disconnected....until you get your system charged.....
I have my AC Compressor clutch disabled in this manner......so that it will not attempt to engage when the defroster is in use.....otherwise I use the "economy" mode on my Klima........:D SB also of note: I have shopped around the area for a good automotive AC shop (I sold all of my AC recovery equipment and tools/instruments some time back).....my local MB dealership will replace my compressor with one that I supply, along with the drier and expansion valve.....do the R1324A conversion....flush and purge the system for $60.00/hr or about $300-$350......if I supply all parts.....they will not be responsible for any labor warranty.......if they supply the parts and warranty the whole deal it will be around $1800.00..... |
Quote:
We need to know more about what tools you have or don't...and if you have some experience with refrigerants, etc... In other words, for a start, how are you going to determine if it has enough ' gas' in it ? |
System fixed!!! I called a friend of mine who is a refrigeration technician and aked him for the pressure gauges he uses. I checked the system and there was gas in there, but too little. He came by and did a pressure test to find leaks, and guess what??
There was a tiny leak in the pressure cutout valve. Somehow the valve body cracked, making the leak. I was lucky that even though the valve body cracked, the low pressure sensing mechanism remained working to protect my compressor. Thanks for all your help guys!! Happy driving! |
All times are GMT -4. The time now is 02:57 PM. |
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website