What can be the result of operating a Thermo King unit with a faulty expansion valve?

Operating a Thermo King unit with a faulty expansion valve can lead to inconsistent temperature control. The expansion valve plays a crucial role in modulating the flow of refrigerant into the evaporator, which is vital for maintaining the correct temperature within the unit.

When the expansion valve is not functioning properly, it can either restrict the flow of refrigerant too much or allow it to flow too freely. This imbalance disrupts the evaporator's ability to absorb heat effectively, leading to fluctuations in the cooling performance. As a result, the environment being cooled may experience varying temperatures, making it difficult to maintain the desired set point. This inconsistency can negatively impact the preservation of perishable goods and the overall efficiency of the cooling system.