Have '92 Civic LX, 4 dr automatic with A/C. I've kept the cooling system
correctly (drain/fill with Honda antifreeze- following directions on
bottles).

OK, the A/C needs to be recharged, but if we turn OFF the A/C button and the
engine registers that it is warm (on the gauges), shouldn't there be SOME
sort of heat coming from the system? I tried numerous vent settings,
numerous temperature settings, outside air/recirculate, etc, but there was
no heat! The car has about 130k miles on it. The heat used to work. Does
the heat solely rely upon the A/C system?

Thx.