Furred Down Unit
Could someone give me a insite on what would cause a furred down to make a gurggling sound in the bathroom sink.
I have cleared the line, by shop vacing the line. I have taking the unit down out of the ceiling and cleaned the coils and the motor blades just cause I was up their, and the noise has continued. This unit is upstairs and it is in a 16 unit building this unit is not butted up againt another unit. I also have another unit which is and it has began to do the same thing these are the only 2 at this time or has been reported, it is very annoning.. Please can any one suggest what to try. thank Priscilla