Do the hoses under the seat (to the rear heater) get warm when the
van is warmed up??  If not, you could try a 'U' joint to connect the
two hoses under the rear seat (that go to the heater) and then test
to see if the hoses get warm as the van heats up.  That way you
isolate the fact that the heater is (should be) getting hot water.  I
also think that you could then remove the heater for a closer
inspection (in the warmth of your house) and maybe a trip to the
local radiator shop.  Just a thought.  malcolm s

Dave wrote: Yes, the level is in the "on" position and yes, the fan works.
>  Is it common to have the rear heater core clog?  >  Dave