ESCO Air Conditioning Practice Exam 2025 – Complete Study Resource

A malfunctioning thermostat often leads to fluctuations in indoor temperature. The thermostat is responsible for regulating the heating and cooling system based on the desired temperature set by the user. When it malfunctions, it may inaccurately read the current room temperature or fail to signal the heating or cooling system when needed. This can result in the system either running too long or not long enough, causing the indoor temperature to rise and fall unpredictably, rather than maintaining a consistent level as intended.

While the other options touch on related concepts, they do not directly reflect the typical outcome of a thermostat issue. For instance, heating and cooling systems operating independently might occur due to other mechanical failures or configuration issues, and increased airflow or enhanced temperature regulation suggests an efficient system operation, which is contrary to the performance of a malfunctioning thermostat.