A couple years ago the combustion fan got noisy on my then 12 year old Accentra. So I replaced it with an aftermarket blower with an NBK motor. Don’t remember who I bought it from. Towards the end of last year it was getting noisy after 2 years so I decided to order an OEM to install when I do my fall cleaning and the original one lasted 12 years. So today when I was installing it I noticed that the aftermarket fan with the NBK motor was rated at roughly 1/2 the amps as the Harman. Might be why it didn’t last as long.