Automotive Service Excellence (ASE) Air Conditioner Certification Practice Exam 2025 - Free ASE Air Conditioner Practice Questions and Study Guide

When conducting an A/C system performance test, low readings on both the low and high-side pressures typically indicate a condition that suggests the system may not be circulating refrigerant effectively. This can often point to a restricted path in the system, which means that the flow of refrigerant is impeded.

The orifice tube, being a critical component that regulates the flow of refrigerant between the high and low sides, can become clogged due to contaminants or debris in the system. When it is blocked, it restricts the proper passage of refrigerant, leading to both low-side and high-side pressure readings. In turn, this situation prevents the system from cooling effectively and results in suboptimal performance.

Identifying a clogged orifice tube can be essential for diagnostics, as it directs the course of repairs in the A/C system, making it necessary to investigate further and possibly replace the orifice tube to restore proper function.