Maintenance Technician 2025 Complete Practice Test

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What is a common indication that an air filter needs to be replaced?

Increased airflow

Reduced airflow and increased energy consumption

The common indication that an air filter needs to be replaced is reduced airflow and increased energy consumption. When an air filter becomes clogged with dirt, dust, and other particles, it restricts the flow of air through the HVAC system. This reduction in airflow can lead to the system working harder to circulate the air, which often results in increased energy consumption. As the system struggles to maintain the desired temperature, you may notice that your energy bills rise or that the system takes longer to reach the set temperature. Regularly checking and replacing air filters is essential for maintaining good airflow, enhancing efficiency, and prolonging the lifespan of the HVAC system.

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Unusual noises from the unit

Clean and clear air quality

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