Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

System Specifications

R134a Press. and Temp. Relationship
Temp/Press Relationship
Similar to R-12 refrigerant, R-134a in an enclosed container will have a specific temperature/pressure relationship as shown in chart.
0 at -22
-4 at 4.4
14 at 14.5
32 at 27.5
50 at 45.0
68 at 68.2
86 at 97.2
104 at 132.0
122 at 177.0
140 at 229.2
158 at 293.0