A malfunctioning evaporator fan can lead to reduced airflow, increased energy consumption, and uneven temperature distribution. This can result in discomfort, indoor air quality issues, and even system shutdowns or error codes. In extreme cases, a faulty evaporator fan can cause the compressor to overheat, leading to premature failure or even system breakdown. Regular maintenance and prompt repair of evaporator fan issues are essential to ensure optimal system performance and energy efficiency.