Just bought a house (not new) and one of the fans only worked in one of 3 clicks. Replaced the switch wire- for-wire (yellow = L, pink = 1, grey = 2, black = 3) and it still only works in one-of-3 positions. Using black for common I get 24vac from each at the connector plug just before the switch. Question: I'd like to find a schematic for it but web searches only turn up dealers. Believe its a Hunter or Hampton Bay.