Air Conditioning Repair Certification (ETI) Practice Exam

Higher outdoor temperatures can reduce cooling efficiency in air conditioning systems due to the increased demand on the system to maintain indoor comfort levels. Air conditioners work by transferring heat from the inside of a building to the outside. When the outdoor temperature rises significantly, the temperature difference between the indoor and outdoor environments becomes smaller, making it more challenging for the system to effectively remove heat from the indoor air.

Additionally, as outdoor temperatures climb, the refrigerant used in the air conditioning system may struggle to absorb and release heat efficiently, leading to a decrease in overall cooling capacity. The compressor must work harder to achieve the desired indoor temperature, which increases energy consumption and can lead to wear on the unit over time.

This interaction between outdoor temperatures and air conditioning performance is crucial for understanding how to optimize system efficiency and ensure comfortable indoor environments during peak summer months.