poss blower motor or fuse?

i have a 01 sc1 and the blower motor doesn't blow all the time.now that it's cold i need it to work all the time.when it works it's fine on all speeds and temps no matter where it blows through.when it doesn't blow i have to hit with my hand on the pass side of the air control and then it works please if you have a how to fix it idea almost step by step it would be apperciated.thank you

Sounds like you have a loose connection. you may have to tear open the dash to get to it.