if ur heaters just stopped blowing on some of the lower settings,its just a printed circuit board.youll find it under the dash in the passengers footwell.just av to get on ur back with torch and look up.its aflat plate 4x2 inch with electrical connection with a couple of screws to hold it in.try scrapyard if no almeras primeras,or nissans of same age should fit.take ur car plug it in to check as it is a fault.scrappers 10-15 quid.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix cars.