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1992 Buick Park Avenue Gas chang over

Tiny
BOBGERT
  • MEMBER
  • 1992 BUICK PARK AVENUE
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 100,200 MILES
I am changing from r12 to r34. Unit is dry added r34 but the compresser dos not start.
Saturday, June 19th, 2010 AT 12:09 PM

3 Replies

Tiny
FACTORYJACK
  • MECHANIC
  • 4,159 POSTS
What prompted the change, and was the compressor functional before the change?
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Saturday, June 19th, 2010 AT 5:33 PM
Tiny
BOBGERT
  • MEMBER
  • 2 POSTS
Aircondesher was workeing ok befor but was low on gas. AS you know r12 is hard to get. So I am changeing over tor34. With r12 removed added r34 but thecompresser & r rad. Fans do not kick in. How do I get around the pressure switch short it out?
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Sunday, June 20th, 2010 AT 7:28 PM
Tiny
FACTORYJACK
  • MECHANIC
  • 4,159 POSTS
The low pressure switch on the accumulator, you can just jumper the two terminals, and it may come on. You could also apply power to pin 4 of the relay connection. You should have power on 2 of the relay terminals from fuse 5 that is in the relay center. The PCM is what grounds the compressor relay, so therefore it can be what is preventing it's operation.
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Monday, June 21st, 2010 AT 11:14 PM

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