The 95 Maxima SE were famous for the heater computer/sensor (not sure of
exact technical name), but my last one has exact symtoms and I brought it to
the dealer. They advised a computer control computer was gone, and ONLY at a
cost of 1000 they would fix it.

I did not fix it, and sold the vehicle to a buyer who had one already with
350,000kms and working heater.

Thanks Mike, it turns out coolant level was low.  Refilled and heat is
fine.
However there is a coolant leak from somewhere out of sight, dripping
off frame.
Guess I need to get underneath to investigate more, or go the
mechanic.
From the top, what I can see of the hoses and connections look ok.
What else could drip - water pump?  (ugh)
TIA
Bob
95 SE
Auto 161K
New England