not sure if your problem is same as one i had. on mine the power control for the heater is very loose. i fiddled about with it by bending it up and moving it along it caught a contact and started my heaters up a little. not perfect but takes the chill from the air.
if that isnt the problem it could be worn brushes in the motor they can be replaced for £15 on ebay. fit em yourself and could be a cheap fix
karl liverpool
January 2010
Automatic Answer
While you wait for answers, we may have found some information which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix vans.