heater don't work on 1995 Mercury Mystique

blower motor will not come on. no power to the fan swith.

Asked by for the 1995 Mercury Mystique
Start with looking at Fuse 23 (15A) in fuse junction panel.
Your fan switch grounds a relay which activates your fan. A wire or connection issue could be the cause. Get a wiring diagram and find out where you are loosing your power.