I have a Sta-Rite Max-E-Therm 400 gas heater that has developed a very loud blower. It used to be virtually silent and the loudest part was hearing the gas ignite. Now the blower has a loud resonance, like something in the blower is out of balance. Anybody have any experience with these heaters? Am I looking at swapping out the entire blower? My pool is only 2.5 years old and I think with all Sta-Rite equipment, I get at least a 3 year warranty. I called up the PB though and they said that doesn't cover labor. So I'm looking at 1Hr labor minimum of $85, plus a $60 long distance fee. I'm wondering if I can't solve it cheaper on my own, but looking for opinions on whether I should just bite the bullet and call in the big guns.