A/C compressor clutch not engaging - AudiForums.com
AudiForums.com

Go Back   AudiForums.com > Audi Models > Audi A4 > B5 Models
Sign in using an external account
Register Forgot Password?
Search

B5 Models Please discuss all 1996 - 2001 B5 A4 topics here...

Reply
 
 
 
submit to reddit
 
LinkBack Thread Tools Search this Thread
  #1  
Old 06-02-2010, 10:07 AM
2nd Gear

 
Join Date: Jul 2008
Location: Brighton, MI
Posts: 1,051
Kraftwerk Turbo vtraudt
Send a message via AIM to vtraudt Send a message via Yahoo to vtraudt Send a message via Skype™ to vtraudt
Default A/C compressor clutch not engaging

After doing the complete 'drive belt' thing and changing the clutch, the A/C compressor won't come on anymore; not sure though if it DID work prior to the clutch work.

I assume it is an electrical connection from the control unit that activates the clutch?

What wire/connectors/sensors/switches should I start checking to troubleshoot the problem?

Could it be 'rusted' in? I can spin the clutch (inside the the A/C drive pulley).

Suggestions, please.
__________________
1998 Audi A4 1.8T Quattro, dark blue, K03/K04+ hybrid, Carbonio CAI, APR Inlet Tubes, APR R1 diverter, GIAC PC16, 31lb inj, 20x6x2.75 FMIC, 185 g/s MAF flow, DP 'sport cat, Milltek CB Exh, Podi Boost Gauge, 17" OZ F1 225/45-17, PowerSlot, Hawk Pads, SB Stage III clutch; 1996 Audi A 2.8 Quattro auto, stock, 2002 AR 6 spd lower wider Stg2 cust
Reply With Quote
  #2  
Old 06-02-2010, 02:04 PM
2nd Gear
 
Join Date: Apr 2007
Location: Minnesota
Posts: 1,161
Default

Did you unplug the connector that is located behind the passenger side headlight, on the side of the condenser, that would cause that... Otherwise youll want to check the A/C pressure, and/or check for codes with a VAG to see whats going on.
__________________
Pre 99 1.8T
Reply With Quote
  #3  
Old 06-02-2010, 02:22 PM
2nd Gear

 
Join Date: Jul 2008
Location: Brighton, MI
Posts: 1,051
Kraftwerk Turbo vtraudt
Send a message via AIM to vtraudt Send a message via Yahoo to vtraudt Send a message via Skype™ to vtraudt
Default

Quote:
Originally Posted by Dallas09 View Post
Did you unplug the connector that is located behind the passenger side headlight, on the side of the condenser, that would cause that... Otherwise youll want to check the A/C pressure, and/or check for codes with a VAG to see whats going on.
I will locate and check the passenger headlight connector first.
Then check VAGcom codes for the A/C module.
IF pressure were low (leak), would that also prevent the compressor clutch from engaging?
__________________
1998 Audi A4 1.8T Quattro, dark blue, K03/K04+ hybrid, Carbonio CAI, APR Inlet Tubes, APR R1 diverter, GIAC PC16, 31lb inj, 20x6x2.75 FMIC, 185 g/s MAF flow, DP 'sport cat, Milltek CB Exh, Podi Boost Gauge, 17" OZ F1 225/45-17, PowerSlot, Hawk Pads, SB Stage III clutch; 1996 Audi A 2.8 Quattro auto, stock, 2002 AR 6 spd lower wider Stg2 cust
Reply With Quote
  #4  
Old 06-02-2010, 02:29 PM
2nd Gear
 
Join Date: Apr 2007
Location: Minnesota
Posts: 1,161
Default

Yep, the connection you are checking is the connection to the pressure switch. This checks for too high or too low pressure and will turn off the compressor (this protects it). If this switch were disconnected, faulty (check that after youve done everything else), or if there is little or no refrigerant in the system, it will prevent the compressor from engaging. A VAG code will be thrown if the switch thinks the pressure is too low. So if you check the pressure with a manual reader on the low service side, and you have pressure you know its a problem with the switch most likely, if you dont have pressure its because you have a leak and all of the refrigerant has escaped.
__________________
Pre 99 1.8T
Reply With Quote
  #5  
Old 05-06-2015, 07:11 PM
1st Gear
 
Join Date: May 2015
Posts: 1
Default A/C compressor clutch

dude what size is the bolt that holds the compressor clutch in? I need to replace the clutch
Reply With Quote
Old 05-06-2015, 07:11 PM
 
 
 
submit to reddit
Reply


Tags
18t, a4, ac, amount, audi, b5, clutch, clutches, compressor, engage, engaging, free, low, pressure, side, spin


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On


 

Advertising
Featured Sponsors
Vendor Directory
Our Sponsors
Audi Custom Rims
K&N Engineering, Inc.
GetCoolParts.com
TunerDomes
Advertise here
All times are GMT -4. The time now is 05:54 PM.

Internet Brands, Inc.
Emails Backup