S55 AMG, S65 AMG , S63 AMG (W220, W221) 2001 - 2013 (Two Generations)

A/C Low pressure line is reading high pressure

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old 08-16-2014, 09:16 AM
  #1  
Newbie
Thread Starter
 
Alan944's Avatar
 
Join Date: Jul 2014
Posts: 5
Likes: 0
Received 0 Likes on 0 Posts
S55
A/C Low pressure line is reading high pressure

My A/C quit working the other day. I got a can of freon and hooked up to the low side and noticed it was reading 75psi...... Way to much. I let some refrigerant out down to normal levels and watched the pressure rise again.

The compressor stays on all the time even when I turn off the A/C.

I'm lost on this one!
Old 08-16-2014, 12:19 PM
  #2  
Super Member
 
w4sim's Avatar
 
Join Date: May 2011
Location: UK
Posts: 556
Received 8 Likes on 7 Posts
S55K AMG
As forum member Critter has said in another thread:-

"It is my understanding that the AC compressor runs all the time on an AMG, when you changed out to the new one you should have recharged right away."

And i have heard that from several other people now aswell.

Your best bet is to get it to an AC specialist straight away.
Old 08-16-2014, 12:26 PM
  #3  
Newbie
Thread Starter
 
Alan944's Avatar
 
Join Date: Jul 2014
Posts: 5
Likes: 0
Received 0 Likes on 0 Posts
S55
This one was replaced a year ago and worked great. I turned the a/c off two weeks ago and didnt drive car since then. Then when I went for a drive the other day I noticed the A/C wasn't working. I put the gauge on to see if it was low on 134A. The pressure was through the roof.

Does the MB pressure run high natively. Thanks for your help!

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: A/C Low pressure line is reading high pressure



All times are GMT -4. The time now is 12:40 AM.