Rheem Classic Plus - Central A/C Air handler making loud noise

by Ramirez
(Hollywood, FL )

I just purchase the house and the unit was put in a year ago by previous owner. The unit makes a hissing noise and then a very loud noise like it's going to explode for a few seconds followed by the sound of running water. It makes the sound before, during or after it is on but it's cooling the house fine.

Model Number: 13AJA36A01
Year Manufactured: 2009, 2007
Capacity: 3 Ton
Serial Number: 7655N300903655