nissan heater?

hi can any 1 help me out am new to the nissan micra .first 1 i have had . few problems with the car but i will start with the heater ? it does work but only when it is turned on fully i have just got the car ( micra super s ) on a 95 plate no i aint got a manual yet and i am pretty good at fixing cars meself any help would be great thanks ......andy you could also email or even add me as a friend on msn ( vez20012001@hotmail.com )