Lewty

Help needed here with a faulty auxiliary heater, I have a 2002 1.9 TDI, noticed this morning loads of smelly fumes coming from the under side of the vehicle, when I looked, there was white smoke and raw diesel dripping from the exhaust of the heater. I have since buying the vehicle 12 months ago always had a problem with poor heating capability, though never seen the smoke and diesel until this morning. I have gathered from this thread that it can be a common problem with the Galaxy, though can't find any reference to the smoke and diesel from anyone else. Before I start stripping things down, particularly in this weather, has anyone any ideas what the problem is ?