Air Condition

Reply

  #1  
Old 12-19-03, 05:38 AM
ucodit
Visiting Guest
Posts: n/a
Air Condition

Hello
I have a 1990 Dodge van and it still has the old type freon in the system, which has leaked down and no longer blowing out cold air, what all has to be changed over to use the new freon 134a?
Thanks for any Info.
 
Sponsored Links
  #2  
Old 12-19-03, 02:44 PM
Desi501's Avatar
Member
Join Date: Oct 2003
Location: Boynton Beach Florida
Posts: 2,207
You have to remove all of the oil from the system and replace it with R134 compatable oil. Recharge the system to 80% of original capacity. Sometime you have to add an extra condensor fan and the fittings have to be changed..

I would add that I do not recommend doing this. I have a lot of background in A/C repairs and in my opinion this is a bad move. R134 is great when it is used in a system that was engineered for it. The use different compressors for the higher pressures. The condensers are larger, the evaporators are designed differently and they use barrier hose. Most of the time R12 will get much colder that R134 when used in an R12 system. you would be much better off the repair the leak and continue to use R12. Retrofits will sometimes work but for the most part create problems and shorten the life of the compressor.
 
  #3  
Old 12-19-03, 02:55 PM
Member
Join Date: Apr 2002
Location: Pittsburgh,Pa
Posts: 2,417
I agree with desi. You still need to find and fix the leak.R134a will leak out faster than R-12 also.
 
  #4  
Old 12-19-03, 04:41 PM
Join Date: Dec 2002
Location: Connetisuck
Posts: 162
Yes R134a will tend to leak faster but never the less. Retrofitting will be the most cost effective way to do it. I would suggest a retrofit and install UV Dye tracer, and find the leak. Pumping a pound of r-12 into the atmosphere is harmful to our environment and a big waste of money.
 
  #5  
Old 12-19-03, 10:39 PM
billys68ss's Avatar
Member
Join Date: May 2003
Location: USA
Posts: 1,459
Considering most shops around here are charging $80.00 a pound for R12 and $40.00 per pound for R134a Yes it is cost effective to retrofit. At the very least the system needs to be thoroughly flushed and the leak found and repaired as Desi and Davo stated. If you want it to be done correctly then the compressor need to be compatable with the R134a. The receiver dryer and expansion valve and any filters in the system should be replaced prior to the retrofit. And of course the fittings have to be updated unless you replace your lines with the correct lines compatable with R134a. Which I strongly recommend.
According to the government R12 is going to be obsolete by the year 2006 so we arent going to have much choice with the retrofits if they have their way.
Billy
 
  #6  
Old 12-20-03, 03:35 AM
Desi501's Avatar
Member
Join Date: Oct 2003
Location: Boynton Beach Florida
Posts: 2,207
Take it from a guy that works in So Florida and sees more A/C problems than the rest of the country. RETROFITTING WILL LEAD TO PROBLEMS. The system was not engineered to run on R134 and will have problems doing it in most situations. It is impossible to remove all of the mineral oil and any that remains turns to thick gel when contacted with R134. The R12 condenser doesn't have to ability to bring the pressure down sufficiently and will lead to compressor problems and poor cooling. Nobody is going to send any R12 into the atmosphere. That's why we have recovery machines.
 
  #7  
Old 12-20-03, 04:26 AM
Member
Join Date: Apr 2002
Location: Pittsburgh,Pa
Posts: 2,417
This should be enough info to make your decision on how to proceed.You have opinions from both sides of the issue.Pros and cons so get in there and get your hands dirty.Have a nice day.
 
Reply

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 Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes