Fan has three wires a black , white and green
Electrical box has white and yellow, great
But what is the orange wire coming out of the box?
Anyone? Bueller?

Where are.you located, those are not typical US colors?

Where are.you located, those are not typical US colors?


Illinois

illinois

Could be eome conduit wire someone devised to use. Have you checked what is hot? Could be part of a 3 wire circuit for srparate fan and light .