Running your AC without a filter for one night may seem like a tempting idea, especially if you're faced with the inconvenience of a dirty or clogged filter. However, before you make that decision, it's important to consider the potential consequences. AC filters play a crucial role in maintaining indoor air quality by trapping dust, dirt, and allergens. Without a filter, these particles can circulate freely throughout your home and be inhaled by you and your family. Not only can running your AC without a filter negatively impact indoor air quality, but it can also affect the efficiency and lifespan of your HVAC system. The absence of a filter allows debris to accumulate on the evaporator coils and other components, reducing airflow and putting strain on the system. This can lead to decreased cooling performance and even problems like frozen coils or compressor failure. In addition to compromising air quality and system performance, operating an AC without a filter may jeopardize any warranty you have on the unit. Most manufacturers require regular maintenance as part of their warranty agreements, which typically includes changing or cleaning the filters regularly. Neglecting this important task could potentially void your warranty if anything were to go wrong with your AC system. So while running your AC without a filter for one night might appear harmless at first glance, it is advisable not to do so due to potential health risks, reduced efficiency, possible damage to components such as evaporator coils, and potential forfeiture of warranties.