Where did my AC Go? - Mercedes-Benz Forum
 
LinkBack Thread Tools Display Modes
post #1 of 9 (permalink) Old 05-01-2019, 04:14 PM Thread Starter
BenzWorld Member
 
Beezersh's Avatar
 
Date registered: Jul 2018
Vehicle: 1993 300e 2.8
Location: Cleveland OH
Posts: 81
Mentioned: 1 Post(s)
Quoted: 15 Post(s)
(Thread Starter)
Where did my AC Go?

Last night I charged up my AC. Got it working nice and cool, drove around today and it was fine. Let me back up a bit though...

Prior to charging I jumped the low pressure switch to see that the compressor ran and received signals from climate controller. Initial gauge readings indicated no pressure in the system....so I pulled a vacuum, it held firm with no needle movement, then I charged the system. However, when I disconnected the high pressure line, some oil and dye sprayed out all over the area around my ps pump, hoses, etc. I did not put this dye in...it was PO.

So, today I took a mild detergent, squirted and scrubbed the area down and rinsed with very low pressure water stream. I dried everything off and blew out the area with compressed air including the compressor connector . I started driving it 15 minutes later and had no air. Also, with full AC on, the compressor wouldn’t allow me to jump it.

Did I just fry my Klima relay or some kind of fusible link? I know I got water on the compressor connector and read somewhere that that if the compressor grounds out, it will fry the klima. Thanks.....and it’s getting hot ��
Beezersh is offline  
Sponsored Links
Advertisement
 
post #2 of 9 (permalink) Old 05-01-2019, 06:06 PM
BenzWorld Elite
 
tuttebenne's Avatar
 
Date registered: Jul 2005
Vehicle: W124
Location: Long Island
Posts: 4,533
Mentioned: 6 Post(s)
Quoted: 474 Post(s)
First thing to check is whether or not your belt tensioner is working properly. A slipping compressor pulley (due to a loose serp belt) will be sensed by the speed sensor on the compressor and the KLIMA will shut off the compressor It is designed to interpret a slowing compressor as one that is failing so it stops it to prevent further damage. Might not be your problem but like I said, its a first step.

'
'93 400E
'93 500E
'94 E320TE
'00 E320
'02 E320
'73 Alfa GTV
'77 308GTB
tuttebenne is offline  
post #3 of 9 (permalink) Old 05-01-2019, 07:35 PM Thread Starter
BenzWorld Member
 
Beezersh's Avatar
 
Date registered: Jul 2018
Vehicle: 1993 300e 2.8
Location: Cleveland OH
Posts: 81
Mentioned: 1 Post(s)
Quoted: 15 Post(s)
(Thread Starter)
Quote:
Originally Posted by tuttebenne View Post
First thing to check is whether or not your belt tensioner is working properly. A slipping compressor pulley (due to a loose serp belt) will be sensed by the speed sensor on the compressor and the KLIMA will shut off the compressor It is designed to interpret a slowing compressor as one that is failing so it stops it to prevent further damage. Might not be your problem but like I said, its a first step.
Thanks. I recently replaced the tensioner damper and serpentine belt. What should I look for other than that ?
Beezersh is offline  
Sponsored Links
Advertisement
 
post #4 of 9 (permalink) Old 05-02-2019, 04:27 AM
BenzWorld Elite
 
tuttebenne's Avatar
 
Date registered: Jul 2005
Vehicle: W124
Location: Long Island
Posts: 4,533
Mentioned: 6 Post(s)
Quoted: 474 Post(s)
Quote:
Originally Posted by Beezersh View Post
Thanks. I recently replaced the tensioner damper and serpentine belt. What should I look for other than that ?
Determine whether or not the compressor tries to come on or if it doesn't do anything. Have an assistant turn on the A/C while you watch the compressor pulley.

'
'93 400E
'93 500E
'94 E320TE
'00 E320
'02 E320
'73 Alfa GTV
'77 308GTB
tuttebenne is offline  
post #5 of 9 (permalink) Old 05-02-2019, 06:21 AM Thread Starter
BenzWorld Member
 
Beezersh's Avatar
 
Date registered: Jul 2018
Vehicle: 1993 300e 2.8
Location: Cleveland OH
Posts: 81
Mentioned: 1 Post(s)
Quoted: 15 Post(s)
(Thread Starter)
Strange, it came back on this morning. I wonder if the area just needed to dry out. Verified that compressor was also engaged as well....seems odd. I guess I just need to monitor it.
Beezersh is offline  
post #6 of 9 (permalink) Old 05-02-2019, 08:29 AM
BenzWorld Elite
 
tuttebenne's Avatar
 
Date registered: Jul 2005
Vehicle: W124
Location: Long Island
Posts: 4,533
Mentioned: 6 Post(s)
Quoted: 474 Post(s)
When the A/C wasn't working was the blower working?

'
'93 400E
'93 500E
'94 E320TE
'00 E320
'02 E320
'73 Alfa GTV
'77 308GTB
tuttebenne is offline  
post #7 of 9 (permalink) Old 05-10-2019, 02:54 PM Thread Starter
BenzWorld Member
 
Beezersh's Avatar
 
Date registered: Jul 2018
Vehicle: 1993 300e 2.8
Location: Cleveland OH
Posts: 81
Mentioned: 1 Post(s)
Quoted: 15 Post(s)
(Thread Starter)
Quote:
Originally Posted by tuttebenne View Post
When the A/C wasn't working was the blower working?
Yes it was. AC still working though we haven’t had real hot days here.
Beezersh is offline  
post #8 of 9 (permalink) Old 05-10-2019, 05:33 PM
BenzWorld Elite
 
tuttebenne's Avatar
 
Date registered: Jul 2005
Vehicle: W124
Location: Long Island
Posts: 4,533
Mentioned: 6 Post(s)
Quoted: 474 Post(s)
Quote:
Originally Posted by Beezersh View Post
Yes it was. AC still working though we havenít had real hot days here.
Okay, this takes the spotlight off the ignition switch. Once it fails again, check the compressor/pulley to ensure the clutch is engaged and the pulley is spinning.

'
'93 400E
'93 500E
'94 E320TE
'00 E320
'02 E320
'73 Alfa GTV
'77 308GTB
tuttebenne is offline  
post #9 of 9 (permalink) Old 06-03-2019, 03:36 PM Thread Starter
BenzWorld Member
 
Beezersh's Avatar
 
Date registered: Jul 2018
Vehicle: 1993 300e 2.8
Location: Cleveland OH
Posts: 81
Mentioned: 1 Post(s)
Quoted: 15 Post(s)
(Thread Starter)
So since this post we had one fairly warm day. Mid 80’s. The AC worked for a bit then stopped. The compressor was not coming on even with a jumper. I had a spare KLIMA relay...swapped it out and the AC was back. I’m thinking I should keep a spare in the trunk (along with other spares).
Robert Kyle likes this.
Beezersh is offline  
Sponsored Links
Advertisement
 
Reply

  Mercedes-Benz Forum > Mercedes-Benz Sedan Forums > W124 E,CE,D,TD Class

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Mercedes-Benz Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 

Title goes here

close
video goes here
description goes here. Read Full Story
For the best viewing experience please update your browser to Google Chrome