Question 185Refrigeration & AC - 1st Asst/Chief

The correct answer is C) The inlet screen may be cleaned. The thermostatic expansion valve is a critical component in the refrigeration system that regulates the flow of refrigerant into the evaporator. The inlet screen can become clogged over time, restricting the flow of refrigerant and impacting the valve's performance. Cleaning the inlet screen is a routine maintenance task that can help ensure the proper operation of the thermostatic expansion valve. The other options are incorrect because they do not represent typical maintenance activities for a thermostatic expansion valve. Recharging the thermal bulb, varying the proportional action, or increasing the rate action are not common maintenance procedures for this component.