Running your air conditioner without a filter is not advisable, as it can cause poor indoor air quality, aggravate allergies, and even damage the unit. Technically, the air conditioner can work without a filter, but it is not recommended to do so. If you don't use an air filter in your air conditioning unit, or if you go months without changing the one that's dirty, you risk having debris such as dust and hair accumulate in your unit. This can cause quite significant damage to your air conditioning system, such as clogging parts and preventing them from working properly, restricting airflow, and causing the air conditioner to overheat and shut off.
It could even cause permanent damage to the engine, which means you'd have to replace it. To keep your air conditioner in good condition and last as long as possible, it's key to use an air filter and change it frequently. Get professional help to help you with the installation, filter, repair or replacement of the air conditioner in your area. The air filter in your air conditioner is responsible for filtering harmful dirt from your home air so that what you inhale is pure, clean and allergen-free.