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How often does an ac require refrigerant refilling service?
So, whenever you hear an unusual whistling sound coming from your AC, inspect the entire system properly. This is because cooling systems produce such a noise when there’s a leak in the refrigerant-line. Apart from that, ice-formation over the refrigerant line also indicates that there’s probably a leak there. Yearly maintenance is the key to prevent several AC problems for those who don’t know much about modern air conditioners.
