Re fan switch...most likely, the fan itself is siezed - it's a common problem.
I would ensure all connections to the switch are made first off;
When switch is operated, do you see the Blower light in the speedo illuminating ? It glows at 2 different intensities, depending on whether speed one or two is selected.
Down beneath the dash, you can see the heater unit hanging behind the centre console. The outlets for foot airflow on either side provide a means of accessing the blower fan (it is a squirrelcage variety, on a vertical axis.) You may need to manipulate the control levers in the console to open the flaps in these outlets. Once in the right position, with switch off, it is possible to reach inside the blower casing (using a wooden spoon handle, pencil, etc) and touch the blower fan. They often sieze in position, due to lack of use, and moisture ingress. Sometimes, you can get lucky, and just shoving the blower around can free it off, so that it responds to power from the blower switch.
There are several threads in this section regarding blower woes...worth a search. Good luck !
when in trouble, when in doubt...run in circles, wave and shout !