When it looks like this you are ready to pull the heater box out, mine took considerable force to remove due to the box being out of shape (melted)
It shouldnt look like this.
So the job is disconnect battery earth.
Remove steering wheel
Undo two sheer bolts on steering coloumn
undo 2 x 13 mm bolts further down steering coloumn and lay coloumn on drivers seat.
remove instrument cluster cover then disconnect the plugs at the back of the cluster, then remove the cluster.
Carefully pry the control levers off the heater controls, then carefully pry the facia off, mines a diesel so remove the enrichening device/choke thingy
remove the blower switch.
drop the glovebox
remove the six small screws at the top of the dash (dont remove the big ones they hold the wipers in) remove the 4 large screws holding the dash in, you have to open the drivers and passengers doors to see these screws.
Undo the 3 screws holding the heater controls to the dash board these are behind the facia and one is inside the hole where the instrument binacle was removed from.
if you have a radio or any extra bits n bobs these will need to be removed also.
Now the dash will come away.
6 screws hold the heater box in place, 2 either side at the top and bottom of the until, 1 either side on the front of the bulkhead, on the right they are hidden by the water hoses.
I did not drain the system, I removed the heater box at this stage and split the box in the van then removed the matrix without disconnecting the pipes.
As you can see from the photo my heate motor was slightly goosed, so i had to replace the box and the motor but i used the original matrix.
Putting it back together is easy, taking it apart is easy as well.
Be careful routing the cables when you reassemble i had to remove the dash again and reroute wires more directly.
I have heat again horay.........
