Notices
E-Class (W211) 2003-2009

A/C "Acting Up?"

 
Old 07-01-2015, 08:52 PM
  #1  
Senior Member
Thread Starter
 
Stuttgarten's Avatar
 
Join Date: May 2014
Location: Concord, CA
Posts: 429
Recieved 18 Likes on 18 Posts
'13 E350 . M276
A/C "Acting Up?"

My A/C would start 2-3 minutes after I would turn it on. I was told system was low on refrigerant R134. So, I was visiting a friend of mine like 50 miles away and he offered to add some R134.

Once he hooked up the pump with refrigerant, we started the A/C and he started to charge the system, he said car needed 3 more pounds of it. As he started to charge system, radiator fan started and ran for the 5 minutes the A/C was charging. He attributed the fan turning to extra load on the engine. Once we were done, I went on my way.

Today I was on freeway and temperature was like 104, so I had to use A/C. At one point, with A/C running, I could hear the radiator fan coming on, after which the cold air was gone, and this lasted for about 10 minutes, but it came back on by itself. Once I exited freeway, I stopped to check engine compartment. I saw radiator fan was on. On my dashboard, engine temp looked normal.

Now why did the cold air cut off for 10 minutes. Why is the radiator fan coming on now when I use the A/C? Before fan would not come on with A/C running.
Stuttgarten is offline  
Old 07-02-2015, 02:37 AM
  #2  
Member
 
Join Date: Jan 2006
Location: Austin, TX
Posts: 173
Recieved 4 Likes on 3 Posts
2008 E350 Wagon
Three *more* pounds? Iirc the system takes 2.2 lbs total refrigerant. You likely overfilled the system and may have already damaged your compressor. I don't say this often, but get thee to a qualified mechanic asap, and don't run the AC at all until then.
purplegrog is offline  
Old 07-02-2015, 12:15 PM
  #3  
Senior Member
Thread Starter
 
Stuttgarten's Avatar
 
Join Date: May 2014
Location: Concord, CA
Posts: 429
Recieved 18 Likes on 18 Posts
'13 E350 . M276
Originally Posted by purplegrog View Post
Three *more* pounds? Iirc the system takes 2.2 lbs total refrigerant. You likely overfilled the system and may have already damaged your compressor. I don't say this often, but get thee to a qualified mechanic asap, and don't run the AC at all until then.
Does the system have a way of discharging extra refrigerant? I recall looking at the charging unit which showed 27 before charging, and after we were done it had gone up to 30. I'm assuming these are not lbs. numbers, that is if the system only takes 2.2 lbs.
Stuttgarten is offline  
Old 07-02-2015, 07:45 PM
  #4  
Out Of Control!!
 
Join Date: Feb 2011
Location: Tampa
Posts: 11,763
Recieved 578 Likes on 561 Posts
1999 E300TD
Yes, however, it's kinda like a manual idiot switch---the procedure is very simple, well for most, first find the H or L shrader valve, second remove the cap, three look at the valve and wada you see--kinda like a tire valve--now the next step takes a little thought---do you remember how to let air out of a tire--if you do follow the same procedure---However I must warn you that it is illegal to vent AC systems into the air, therefore do it at night!!
Plutoe is offline  
Old 07-02-2015, 07:50 PM
  #5  
Senior Member
Thread Starter
 
Stuttgarten's Avatar
 
Join Date: May 2014
Location: Concord, CA
Posts: 429
Recieved 18 Likes on 18 Posts
'13 E350 . M276
Originally Posted by Plutoe View Post
Yes, however, it's kinda like a manual idiot switch---the procedure is very simple, well for most, first find the H or L shrader valve, second remove the cap, three look at the valve and wada you see--kinda like a tire valve--now the next step takes a little thought---do you remember how to let air out of a tire--if you do follow the same procedure---However I must warn you that it is illegal to vent AC systems into the air, therefore do it at night!!
Awesome! which shrader valve needs venting, right or left? They sit right next to each other.
Stuttgarten is offline  
Old 07-03-2015, 06:03 AM
  #6  
Out Of Control!!
 
Join Date: Feb 2011
Location: Tampa
Posts: 11,763
Recieved 578 Likes on 561 Posts
1999 E300TD
I knew you would need further clarification, therefore I boned up on an answer--remember that if the system has refrigerant the system is under a pressure and think of the system as an old two hole out house---well you have a choice of a dump on the right or left side--well similar analogy---you have two valves that open----which one will lower the pressure if opened---now think of another dump--which side will add more dump to the outhouse--correct--either side, therefore which valve when opened will reduce the pressure---I'll leave that answer to your little mind!!!
Plutoe is offline  
 

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

Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:

Quick Reply: A/C "Acting Up?"


Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: