Check again for labels on the 4 white wires that come out of the motor body, they will be there, L1, L2, L3, L4.
Assuming it was wired for 240V before: L2 & L3 are connected with a wire nut. (top right of photo)
Switch looks fine, 2 poles, 4 wires.
Remove the wire nut from L2 & L3, separate...