Temp idiot light, getting worse

[Cade Carvell]

Hello,
  I have an question about the idiot light.  I am still waiting for the
Bently to arrive.  When I bought the car (87 4000 Quattro), it would
occasionally blink on heavy load (foot to the floorboards), but as the
last month has progressed, it has gotten worse.
  Today, on the way to work, it pretty much stayed on consistently.
The temp gauge showed normal operating temp.  Does anyone know which of
the apparant 3 sensors this is.  I checked the coolan level, it is good,
and the engine doesn't act like it is overheating.
  The three sensors I am refering to are the two stuck on the neck of
the head were the radiator hose enters (top side and bottom side of the
neck), or the coolant level sensors in the overflow tank.

Thanks,


Cade Carvell
National Business Systems, Inc.
Eagan, MN 55121
Office: 651-994-4400