When the light comes back on, without stopping the engine go back there and
check the level in the pressure tank. If there is air in the system stopping
the engine can push the coolant back up making the tank full. This symptom
can also be caused by a bad pressure cap. When the engine is warm grab a
hose and try to squeeze it. It should be hard almost like the tire.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Mister Tom
Sent: Tuesday, January 24, 2012 7:56 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Blinking Temp Light

When I start my '87 Syncro Westy the LED flashes as it should, then stops.
Recently it has been coming back on blinking, sometimes for a bit, then
stopping by itself. Other times it stays until I turn the power off and
restart.

Burp tank is full and cap sensor is duly wiggled. Still happens.

I know there is a voltage regulator and a castapitor on the instrument
cluster. Is it time to shotgun these, or might there be a better starting
point, given my symptoms.

TIA,

Tom Salicos
'87 Syncro Westy EG-33