Re: [AMC-List] AC installing

["John Elle" <johnelle@xxxxxxxxx>]

It was 107 today! It's been triple digits now for over a week. Summer is
warming up a bit then it will get hotter. 
I have converted all of my freon A/C automotive units to R134. Here is
the differences that I have noticed. 
When the outside temperature gets over 95 degrees the 134 units just
keep right on cooling. At 100 degrees the Freon units were straining
their little poopers to blow cold air. At 110 degrees the exact same
unit will blow ice cold using 134. There will be a tendency at a stop
light for the air temperature to get warmer but as soon as the car is
under motion the air temperature begins to drop again. I have no problem
using 134 and have found on the whole it cools better than freon.
 
SNIP
you can't just empty the r12 and recharge with r134,
SNIP
Sonofagun, I did not know that! 'Cause that is exactly what I do! Well
actually about 4 years ago that was the urban legend involved as freon
started to disappear but in this area there are a whole lot of extremely
knowledgeable A/C guys that deal with automotive A/C quite regularly.
Did I mention that there has been a whole week of triple digit
temperatures and the high was 107. Howabout tomorrows high at 109. It
will start cooling down along about October but triple digit is a way of
life here and if the A/C does not work the car ain't worth having. 
On a working system I vent the freon, leave a fitting open and purge the
lines with 1 can of 134, then install using the adapter on the line with
the refill hose using the gauge and set for the recommended pressure
based on outside temperature. Of course that is making sure I re-seal
what ever fitting I opened as a vent. On a non-working system I make
what ever repairs are required and fill it with 134 and call it good to
go. 
So as far as I am concerned I discount the "You can't do that's" and go
ahead and fill them up. So far over the last 4 years I have had no
failures that could be attributed to the use of 134. 
For what it is worth.
John.
 
 
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