|
Low Side Gauge Reading
|
High Side Gauge Reading
|
Potential Causes
|
|
Low
|
Low
|
Low Refrigerant Charge
|
|
Restriction between Compressor and High Side port
|
|
Low/Normal
|
Evaporator Freezing
|
|
High
|
Restriction between the Low Side and High Side ports or Restricted TXV
|
|
Compressor Stuck at Maximum Displacement
|
|
High
|
Low
|
Compressor has Low Displacement or Internal Malfunction
|
|
High
|
Malfunctioning Cooling Fans
|
|
Refrigerant Overcharge
|
|
Restriction between the Low Side Port and Compressor Inlet
|
|
Restricted Condenser Air Flow
|
|
Expansion Device Stuck Open
|
|
Air in A/C System
|
|
Normal/High
|
Normal/High
|
Refrigerant Contamination
|
|
PAG or POE Oil Overcharge
|
