is this fan oem? can't see mentioned anywhere in the owners manual ! nor can I find a switch. i didn't even know it worked until up on the roof replacing the vent lid and clearing some debris and it suddenly sprung into life, i couldn't work out how to switch off, so pulled the wiring lose which promptly blew a fuse to the switch board... at the fan stopped running , it was shot, noisy and rattling.
thinking of replacing entire unit with a fantastic fan at some point, so at least there is 12v
power up there.