Regular air filter replacement is EXTREMELY important to any air conditioning system. Especially, if you have pets, like cats or doggies. If you do, you must inspect your filters (at least) every (2)two weeks, and replace them monthly. This is important for proper air flow, condensate drain line, electrical efficiency, and the longevity of your compressor’s life.
Proper maintenance is vital. Would you drive your car without an oil change? It will cost you a lot more in time.
We see coils like this every day.