When both the gauges of an air-conditioning system read low pressure, what might be the problem with the A/C? Select one: a. The system may be low on refrigerant b. The compressor is not working c. There is a blockage in the low side of the system that is not allowing refrigerant to pass d. There is a blockage on the high side or an airflow restriction across the condenser

The correct answer is a. The system may be low on refrigerant.<br /><br />When both the gauges of an air-conditioning system read low pressure, it indicates that there is a lack of refrigerant in the system. Refrigerant is the substance that carries heat from the inside of the building to the outside unit. If the refrigerant level is low, it means that there is not enough refrigerant to carry out this function, resulting in low pressure readings on both gauges.<br /><br />It is important to note that low pressure readings on both gauges do not necessarily mean that the compressor is not working (option b). The compressor is responsible for compressing the refrigerant and pumping it through the system. If the compressor were not working, it would likely result in high pressure readings on both gauges.<br /><br />Similarly, a blockage in the low side of the system (option c) or a blockage on the high side or an airflow restriction across the condenser (option d) would typically result in high pressure readings on one or both gauges, not low pressure readings on both gauges.<br /><br />Therefore, the most likely cause of low pressure readings on both gauges in an air-conditioning system is that the system may be low on refrigerant (option a).