Hi I'm starting a new thread.

I found the 2 pipes that are needed to flush the heater matrix.

So I went and unclipped them and flushed them out and now I can't figure out which one goes back onto which. Also I topped up my water and the temp is sitting on normal (in the middle). But after driving for a hour I checked the water tank and it was cold and no pressure on it which is worrying.

The fan is blowing hot air in the van now so something is working at least.