Air filters not only purify your indoor air and keep it free of bacteria and viruses but also maintain smooth airflow within the air conditioner. Without air filters, the internal part of your air conditioner will be full of dirt and dust.
Sometimes, the airflow does not remain smooth due to dirty air filters, and dust enters the system. This dust settles on the evaporator coils, due to which the refrigerant will not absorb any heat from the indoor air, decreasing the temperature to the extent that ice forms on the coils. Keep your air filters clean to avoid this problem.