An HVAC system can operate without a filter, but this is not recommended. Without a filter, the system will suck in debris-laden air and return the same dirty air to the indoor environment, contributing to health problems. Although the answer to this question is yes, your air conditioning system will continue to operate without a filter, you should never attempt to do so. We understand that you may not always have a new replacement filter on hand when you want to replace your current one, but it's best to wait until you have a replacement filter.
Running the air conditioner without a filter is worse than running it with a dirty one. Instead, go to the store as soon as possible for a replacement or call an HVAC professional to have it replaced. Without a filter, your air conditioner is at risk of serious and costly problems. Follow our advice and never run your system without one.
Filters are not designed to block air for the rest of the time. Regardless of the type of air conditioning unit you use, they ideally need regular inspection and proper maintenance. Yes, the central air conditioner has a filter. In fact, most central air conditioning units have two or more filters.
These filters clean the air and ensure good air quality as the unit circulates between indoor and outdoor air. Depending on the type of filter you have, six months is the longest you should go without replacing or cleaning the filter. If you use disposable filters, find the exact filter size to purchase and install a replacement filter. If you have dirty filters in your air conditioner or you don't have any filters, dirt and debris will accumulate inside as they adhere to the coils and fins, creating a thick layer of dust on the coils.
If you don't replace the air filter often enough, it will work less efficiently or it may stop working altogether due to clogged filters. This is perhaps a little more obvious, but without the air filter to filter dust, your air conditioner will now throw dust all over your home.