HomeHome  PortalPortal  CalendarCalendar  GalleryGallery  FAQFAQ  SearchSearch  RegisterRegister  Log in  

Share | 
 

 93 roadie a/c not working

View previous topic View next topic Go down 
AuthorMessage
59 wagon man

avatar

Posts : 105
Join date : 2011-07-13

PostSubject: 93 roadie a/c not working   Sat Aug 17, 2013 9:16 pm

works great for the first 2 minutes ,then no power to the compresser. I swapped out the blower control module and the ecm . anyone have any ideas?
Back to top Go down
silverfox103
Moderator
avatar

Posts : 2673
Join date : 2008-11-05
Age : 68
Location : Littleton, NH & St. Simons, GA

PostSubject: Re: 93 roadie a/c not working   Sat Aug 17, 2013 9:44 pm

Low freon?
Back to top Go down
Olds Weighty Eight

avatar

Posts : 1061
Join date : 2011-05-15
Age : 50
Location : Memphis, TN

PostSubject: Re: 93 roadie a/c not working   Sat Aug 17, 2013 9:49 pm

Likely that the low pressure cut off switch is to blame. Temporarily jumper the connector to bypass the switch and see if it keeps running. If it does, keep in mind that the switch may be doing it's job and may be indicating a system pressure issue. Or, the switch is bad.

Something else to check is the A/C relay. Should be mounted next to the fuel pump relay under the hood by the firewall.
Back to top Go down
http://www.lakelandraceway.com/friends_garage
buickwagon

avatar

Posts : 903
Join date : 2011-06-10
Location : Muskoka, Ontario

PostSubject: Re: 93 roadie a/c not working   Sat Aug 17, 2013 9:56 pm

I wrote a long primer on our AC system: http://www.buickforums.com/forums/showthread.php?t=26737

From what you describe, I would suspect a blockage in the system causing extremely high pressure, tripping the high pressure cut-off. Or low refrigerant causing a low pressure condition when the compressor draws it down. Does the system cycle?

What you need is to check the pressures with a gauge set. If you can get ahold of a proper scan tool, check the raw data stream on the HP switch. Once you have some idea of what is going on, look at the second last post on the second page of that thread for some troubleshooting tips.
Back to top Go down
Guest
Guest



PostSubject: Re: 93 roadie a/c not working   Sat Aug 17, 2013 11:30 pm

buickwagon wrote:
I wrote a long primer on our AC system: http://www.buickforums.com/forums/showthread.php?t=26737

From what you describe, I would suspect a blockage in the system causing extremely high pressure, tripping the high pressure cut-off. Or low refrigerant causing a low pressure condition when the compressor draws it down. Does the system cycle?

What you need is to check the pressures with a gauge set. If you can get ahold of a proper scan tool, check the raw data stream on the HP switch. Once you have some idea of what is going on, look at the second last post on the second page of that thread for some troubleshooting tips.
Is there any other way you write!?lol!
Back to top Go down
buickwagon

avatar

Posts : 903
Join date : 2011-06-10
Location : Muskoka, Ontario

PostSubject: Re: 93 roadie a/c not working   Sun Aug 18, 2013 6:31 am

The AC tutorial is admittedly long even by my standards.
Back to top Go down
Sprocket

avatar

Posts : 5311
Join date : 2008-11-04
Location : Palm Beach County

PostSubject: Re: 93 roadie a/c not working   Sun Aug 18, 2013 11:31 pm

Jeff, I have a set of gauges if you need 'em
Back to top Go down
59 wagon man

avatar

Posts : 105
Join date : 2011-07-13

PostSubject: Re: 93 roadie a/c not working   Mon Aug 19, 2013 10:15 am

pressure is fine, it blows cold for a few then the comp stops
Back to top Go down
Fred Kiehl

avatar

Posts : 4307
Join date : 2009-11-13
Age : 68
Location : Largo, FL 33774

PostSubject: Re: 93 roadie a/c not working   Mon Aug 19, 2013 11:12 am

Does it still have voltage at the connector when the compressor stops? If so, is the ground still good at the connector?
Back to top Go down
buickwagon

avatar

Posts : 903
Join date : 2011-06-10
Location : Muskoka, Ontario

PostSubject: Re: 93 roadie a/c not working   Mon Aug 19, 2013 11:20 am

59 wagon man wrote:
pressure is fine,
What are the pressures (high and low) when it quits? Does it cycle back on eventually, only after sitting for a while, immediately after cycling the key, or ???

Back to top Go down
Sprocket

avatar

Posts : 5311
Join date : 2008-11-04
Location : Palm Beach County

PostSubject: Re: 93 roadie a/c not working   Mon Aug 19, 2013 11:51 pm

He told me if he turns off the motor for a couple minutes, on star it'll run again fine for a couple minutes then the compressor stops, blower still blows. I suggested swapping the relay module under the dash with the parts car he took the motor from as the AC was working fine in that one. I assume it didn't help as he posted several hours after we spoke.
Back to top Go down
Sponsored content




PostSubject: Re: 93 roadie a/c not working   

Back to top Go down
 
93 roadie a/c not working
View previous topic View next topic Back to top 
Page 1 of 1
 Similar topics
-
» James Connolly: A Working Class Hero
» SCM Music Player Not Working
» Line Break not working (HTML)
» Mobile version not working on my site
» CSS Text-Shadow not working

Permissions in this forum:You cannot reply to topics in this forum
GM Longroof Forum :: Longroof Tech :: Heating and Air Conditioning-
Jump to: