'96 850 Heating and AC Problems

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Sounds like the resistor to me, as to my knowledge that's the only thing controlling blower motor speed is the resistor. These are easy enough to fit and pretty reasonably priced.

Here's a link to what is potentially the same problem by another poster on this forum:

click me

Not true. If the MCC fan speed selector switch is bad,
power doesn't even make as far the resistor pack.
And from the description given by the OP, there's
something hinky going on with that switch.
It should crisply snap from position to position
with no additional wiggling or pressure involved.

Sure, the resistors may have also "reached the
end of their broadcast day", no doubt, but beginning
with that sketchy switch is the first move that I'd suggest.

It's all in the wiring diagram:
95 850 MCC Wiring Diagrams.pdf

Yeah , +1000 to that.

Electrical things that work when pressed...means resistance...resistance means heat....heat means fire.