Climate Control Head Problems on an '88 5KSQ

["Christopher Ritchie" <cjr1@gte.net>]

The blower fan for the climate control system doesn't work properly when in
the "ECON" position.  (Or any other position.)  It does not come on to blow
heat when the engine warms and it will not respond to the "HI" or "LO"
buttons.  Sometimes, after driving awhile, it will come on and operate
properly.  That seems to happen when I go over a bump, but that could be my
imagination.  Whacking the side of the console does not help.

Checking the channel 10 fault memory display on the A/C control head (per
Bentley p. 87.117), it gives a fault code greater than 19.  Pushing "HI"
then does nothing.  Bentley says that this means to "replace A/C control
head."  I realize that these things are weak spots on these cars.  I
understand that  these things are also quite expensive.  I cannot get to a
junkyard to get another.

Questions:

1.  Can they be fixed?  Would it make sense to take it apart and look for
loose connections?
2.  Can I "cob job" a jumper wire to the blower motor and operate the thing
manually?
3.  Anybody want to sell a used one?  This is the newer '86-'88 one.  Does
not have the rear window defroster switch on it.