I have a York Diamond 80 HVAC unit, and the blower motor sounds like it needs to be replaced. I think the bearings are going, and the whole thing is rattling and vibrating. The unit is installed in a very small closet, and I only have access to the front panel, where the removable maintenance covers are located. I can also get underneath the unit through an air intake crawl space. Can someone help me figure out exactly how to remove (and replace) the blower motor? Thanks!