Air Conditioning Repair Certification (ETI) Practice Exam 2025 - Free Air Conditioning Repair Practice Questions and Study Guide

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What issue could a partially clogged capillary tube in an air conditioning system cause?

Increased system efficiency

System overcooling

Starved evaporator

A partially clogged capillary tube in an air conditioning system restricts the flow of refrigerant, which can lead to a condition known as "starvation" at the evaporator. The evaporator relies on a consistent flow of refrigerant to absorb heat from the indoor air effectively. When the flow is restricted due to the clog, the evaporator does not receive enough refrigerant to facilitate the heat exchange process. This insufficient refrigerant can result in a drop in evaporator temperature, causing the evaporator to be unable to cool the air properly, and ultimately leading to a reduced cooling capacity for the entire system.

Understanding this concept is crucial, as it emphasizes the importance of the capillary tube's role in maintaining balanced refrigerant flow for optimum cooling performance.

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Lower energy consumption

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