Originally Posted by Majnoon
My bet is on your switch melting and 3 and 4 haven't melted yet. Pull the switch and look at it. It's common by the way. I'm on number three. You would think a obvious flaw that can fog your windows up should be a safety recall but f no.
Edit. I've never seen the resistor as the culprit unless only high (4) works. You got 3 so switch is still my best guess. The resistor plug can melt too but is far less common.
It depends on which resistor in the pack blows. Actually, if only high works, it's just as likely to be the switch. High does not use the resistors, all other speeds do. On mine, the first 2 wouldn't work and the rest did. It was the resistor pack. Still, it could be either one. Checking the switch is easy enough to eliminate that pretty quick before spending any money though.