Folks -

Need some suggestions.  The dreaded flashing red coolant light has come on in
my '85.  The van isn't loosing any coolant, the main coolant bottle and
overflow is full, everything appears to be fine.  I've replaced the sending
unit that is on the main coolant bottle, so that isn't the problem.  Nothing
else is obvious to me, so I need to start digging into the 'less obvious'.
Any suggestions are much appreciated.  I know I'm not in any danger from this
condition right now, but in the even that the main bottle ever does loose
coolant, I'd like to be aware of it.  And besides, the flashing red light is
just plain annoying.

Thanks for your help.

Mike W.