12-3-1 SEALED SYSTEM DIAGNOSIS
“Not Cooling” Complaint
All components operating, No airflow problems, Not frosted up as a defrost problem
problem has been isolated to sealed system area
PartialFrost
Pattern?
Equalization
Test
| Very Fast |
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| Very Slow |
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| Fast |
Inefficient | Partial |
Compressor | Restriction |
Condenser
Temperature
Hotter than Normal
Room Temperature
Air/Low Side
Leak
Trace of Oil
Yes
None
Equalization
Test
Very Slow
Very Fast
Complete
Restriction
Cap Tube
Sound
Faint
None to Weak
Loss of Change
Compressor Not
Pumping
No
Leak
Undercharge
(The equalization test is trying to restart a compressor using a start kit after it has been operating.)
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