The answer to 'my air filter keeps shutting off' is that the air filter is likely becoming clogged and restricting airflow, causing the HVAC system to shut off to prevent damage. This can happen due to factors like pets, high dust levels, or simply not changing the filter regularly enough.
Some common symptoms of a clogged air filter include the system cycling on and off, reduced airflow, and higher energy bills. The solution is to check and replace the air filter as recommended, usually every 1-3 months. If the issue persists, it may indicate a more serious problem that requires a professional HVAC technician to diagnose and repair.