Duovalve gubbins

[Parrot of Doom]

I thought this might be of interest:

http://www.v12uberalles.com/Rear_AC_System.htm

It gives a fairly detailed description of how the duovalve system works, and how to fault find.

 

[television]

Yes it is a good article, you do need a lathe to do any coil winding, and it needs a rev counter

 

[Parrot of Doom]

£172.85 inc VAT for a new duovalve.

The problem with mine is either mechanical (valve sticking open), or a fault with the temperature control panel. I'm going to try and rule the latter out tomorrow when I switch over the wires to the duovalve to see if the fault moves to the other side of the car.

 

[basamir]

hi all,

if the bobbin housing is hot that's mean that the bobine are excited? That mean there was not an open circuit in the valve?