Michael,

Thanks for your observations. I will look in those places you suggested. I'm guessing that the drain you refer to is the same that drains the condensation from the evaporator when using the AC in humid conditions.

The heater core doesn't sound like an inexpensive or enjoyable replacement given it's location in the dash. What kind of expense should I plan for if this is indeed the problem.

Thanks,

__________________
-Mike
'87 300TD 304kmi (RIP)
'95 Toyota Camry Wagon 125kmi