Volt |
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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 |
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