mga sir,
e panu naman kapag may whistling sound sa aircon every now and then? yung lamig niya oks pa din pero mga tunog nga lang. salamat!
baka naman mayroon na isang airduct na may obstruction or natupi inside causing the whistling sound. since lumalamig naman ang aircon mo and it serves its purpose, wait ka na lang till your aircon system is due for cleaning. then have it checked na rin including the aircon ducts.