Master cool when it goes on it makes a vibration sound, almost like wind blowing thru it. Seems like after awhile it isn't a constant sound, the sound then comes & goes Help
Make sure you have enough exhaust openings in the house. Turn on the unit with an outside door open and see if the result is the same. To me it sounds as if you have too much back pressure and not enough ventilation.
Answers & Comments
Make sure you have enough exhaust openings in the house. Turn on the unit with an outside door open and see if the result is the same. To me it sounds as if you have too much back pressure and not enough ventilation.