Thanks guys! That answers one question, but I still have a problem...
I do have an engine temp gauge, and it reads really really cold, so it seems
like there must be a problem with the thermostat, which is what I suspected.
However, neither of the hoses from the heater core is hot, so it seems like
the heater core is also plugged. Tomorrow I shall undertake installing a new
thermostat and flushing the heater core. Oh, and the hot water control valve
is connected and moves when the temp control slides from hot to cold...one
thing I don't have to fix, yay!
As for the blower, I just replaced the fuses and the relay, but the blower is
still only working on high. The relay had condensation in it, as did the fuse
area, and both the fuses and relay were corroded. I cleaned everything out
as best I could...is there something wrong with the area the relay plugs in
to? There didn't seem to be any obvious corrosion anywhere else other than
the fuses and relay themselves....Any other ideas?