What may indicate the presence of moisture in a Thermo King refrigeration system?

The presence of moisture in a Thermo King refrigeration system can significantly disrupt its operation, and a deep vacuum on the suction side with a warm/dry suction line is a strong indicator of this issue. When moisture enters the system, it can cause refrigerant to freeze, leading to low pressure readings. In a situation where the suction pressure is in a deep vacuum, this suggests that the system is not able to draw in the normal amount of refrigerant vapor due to ice blocking the flow, which can often occur when moisture is present.

Additionally, a warm and dry suction line further implies that the refrigerant is not evaporating properly due to possible freezing inside the evaporator or along the suction line, creating a situation where the system cannot effectively absorb heat. Therefore, these symptoms directly imply a malfunction linked to moisture contamination, highlighting the importance of managing and mitigating moisture in refrigeration systems to maintain their efficiency and functionality.