[Vwdiesel] '91 Jetta TD Heating System

[worb at finning.ca]

Hey all,
Would anybody know where I could find a Remove and Install and
troubleshooting procedure for the heating system on my '91 Jetta TD?  I have
my old bunny book and it shows it in the engine compartment by the
windshield wiper motor.
This one, following the coolant hose, is in the vehicle behind the dash
somewhere.  How far do you have to go removing the dash to access?  What a
PITA!!
Oh well, must be done.  There a blockage somewhere and it is getting colder
and colder without any heat (it's -15 celcius outside)

TIA,
Walter