Did a search on this but didn't find much.  84 Westy, heat seems to be
working fine (although not as hot as I remember, although it could be
my imagination) Whenever I come to a stoplight and reach down to feel
the heat (front, havent checked the rear) its blowing cold until I
start moving again.  Weird and wacky to me.  No coolant leaks and
bottle is full.