What occurs when the thermostat's set temperature is lower than the liquid refrigerant supply SAT temperature?

When the thermostat's set temperature is lower than the liquid refrigerant supply's Saturation Temperature (SAT), the solenoid will not close because the refrigerant is still able to absorb heat and provide cooling as needed. The SAT represents the temperature at which the refrigerant is in equilibrium between its liquid and vapor phases. When the SAT is higher than what the thermostat is calling for, it indicates that the system is still effectively able to perform cooling functions. If the solenoid were to close, it would interrupt the flow of refrigerant necessary for the cooling process, potentially leading to temperature inconsistencies or other operational issues.

Maintaining the solenoid in an open position allows the system to continue functioning and responding to the cooling demand, thus preventing the system from becoming less effective at removing heat.