On a long highway run last night the heating system behaved strangely.  It
was very cold outside, -20c or about -4f, and very windy.  The van never
got very warm even with the heat and defrost levers in the fully open
positions and the fan at max.  There was heat but not enough.  when we
stopped for donuts I noticed that as soon as we got off the highway the air
coming from the defrost vents started to cool down while the air from the
footwell vents remained warm.  After being stopped for a few minutes with
the engine idleing the defrost air was cold and the footwell air remained
warmbut not hot.  The temp guage stayed in its usual position over the LED
throughout the drive and the ten minutes spent stopped.  Anyone know what
is going on here?
TIA

Miguel Calvin               ==+=========
mcalvin@ican.net           /[ ][  ][  ]}|
Guelph, Ontario, Canada   |  _       _  |
83.5 Westy, "Frieden"     =-'O`-----'O`-= ~~
1.9l H2O and manual trans