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R-134a PressureTemperature Relationship
Pressures shown in the charts are provided as a general guide and may not represent your exact readings. Ambient temperature is measured 2 inches in front of the condenser.

Low Side Readings
(PSI)
Evaporator Temperature (Fahrenheit)   High Side Readings
(PSI)
Ambient Temperature
(Fahrenheit)
16-29
33-50
115-200
70-80
19-39
33-60
140-235
80-90
25-43
40-65
165-270
90-100
37-51
48-65
210-310
100-110


R-12 PressureTemperature Relationship
Pressures shown in the charts are provided as a general guide and may not represent your exact readings. Ambient temperature is measured 2 inches in front of the condenser.

Low Side Readings
(PSI)
Evaporator Temperature (Fahrenheit)   High Side Readings
(PSI)
Ambient Temperature
(Fahrenheit)
10
2
 
130-160
60
12
6
 
140-170
65
14
10
 
150-180
70
16
14
 
160-190
75
18
18
 
170-210
80
20
20
 
180-220
85
22
22
 
190-230
90
24
24
 
205-250
95
26
27
 
220-270
100
28
29
 
240-290
105
30
32
 
260-310
110
35
36
 
285-335
115
40
42
 
310-370
120