Air Conditioning Repair Certification (ETI) Practice Exam

An oversized air conditioning system primarily leads to frequent cycling of the compressor. When the system's capacity is too great for the space it is cooling, it cools the environment quickly without running long enough to effectively remove moisture from the air. This rapid cooling causes the thermostat to signal the compressor to turn off shortly after it starts, leading to a situation where the compressor turns on and off frequently.

This frequent cycling can lead to several repercussions, such as increased wear and tear on the components of the system and reduced efficiency overall. It can also contribute to discomfort in the space being cooled, as the temperature can fluctuate more noticeably due to the short run times. Additionally, while low airflow across the evaporator can be an issue, it is more closely related to undersized systems or airflow restrictions, rather than being a direct result of oversizing. An oversized unit does not typically cause increased humidity levels or higher energy consumption in a straightforward manner, as these depend more on other factors like system efficiency and operational time.