Within the last week my coolant light has started flashing at start up each
morning.  The light will begin flashing right after the
the engine starts and I have to turn the ignition off at least twice to
reset it.   I have checked the expansion tank each time and it is full.   I
am not loosing coolant because the level in the resevoir has remained
consistent.   The sensor in the expansion tank is new within the last 2
months.   The collant is also new within the last 2 months  (Pentosin).
Also the problem arises only in the morning and does not repeat throughout
the day no matter how long the bus sits.

Any suggestions?

John McLean  87  Vanagon  GL