Based on the email exchange, it sounds like the fan started making rattling noises and then stopped working entirely. It’s not clear if it stopped working because somebody unplugged it or turned it off at a breaker (nobody has said they did), or if it just fully broke or flipped a breaker.
If a bearing went bad and chewed up some parts I may be able to lend some machining capability to that problem. I also have an exhaust fan (Panasonic FV-20NLF1 WhisperLine 240 CFM In-Line Fan, 6-Inch Duct) that I could contribute to the cause if reimbursed for it by IG. I’ll need one at home eventually, so I can’t just donate it, but I don’t need it yet. We’d need a rain-proof vent, but could mount that unit inside because it’s quiet.
Of course this happened right as we got the first snow of the season. We don’t want to be on the roof with snow or ice. It’s supposed to be cold and clear on Saturday, and warm up to the high 30s on Sunday and Monday. I could help work on this on Sunday morning or Monday evening. Anyone else available to work on this?