HI
I am in SF Bay Area, but not San Mateo County.
If your court orders say visitation is at her house between 3-7 pm on Fridays, but she's at work, then go to mediation and ask for visitation times to change. Currently it sounds like BOTH of you are in contempt for not trying to work this out. Clearly the situation changed from the time the order was written.
So both of you need to work out a new visitation schedule and both of you stop with the contempt motions. That's what mediation is for - to work out things before you get to the actual court hearing so you don't waste a bunch of time in court.