Yes, a home warrenty did replace the unit. I've had this new unit
since July and never heard the noise until heating season, so I'm ass-
u-me ing, the defrost is only needed in the winter. The unit works
great and the house has never been warmer even with an ice storm that
coated the entire unit. But to coin a phrase from the Grinch: The
noise, the noise, the noise, noise, noise, noise........
I mean, it really is loud, and it not a rattling sound it's more
like ... did you ever hear an electric fogger or electric paint
sprayer buzz? It's that sound only 3 times as loud. Emagine that
sound every 1.5 hours all night long, every night. The crazy thing
is, the dog sleeps right through it!
But you all agree, maybe I should have the installer back for a
checkup? (it's going to cost me $50. deductable).