The blower on my Rheem Criterion II model RGPH-10EBRJR has been getting louder and louder over the past year. It is to the point now that I really need to get it replaced. I am positive it is the ball bearings in the direct drive motor. I believe the motor is covered by a limited warranty of 5 years by Rheem after reading a pdf manual online (my builder did not supply me with a manual) this morning. How do I get service on this? I cannot find a number for Rheem and I am not sure that a local HVAC guy will work with Rheem to satisfy my warranty. The unit was 3 years old as of July. Manufacture date of 03/2003.