First, the flashing light due to improper coolant mixture is a Vanagon
myth.  In a properly working system the light will not flash if you have
plain water for coolant.

There is a capacitor in the gauge, where the LED is, that goes bad and
can cause continuous flashing.  Humid weather can add to the problem.

Have you had the instrument cluster out recently?  Maybe the wiring
connectors aren't making good contact.

Try turning on the ignition and waiting for 5 or 10 seconds before
starting the engine and see if there is a difference.

Mike
Houlton, Maine

David Shepherdson wrote:
>   I am getting the flashing coolant light in my 87 syncro. It is not a problem with coolant level or temperature. I have read some of the many archives which would suggest a ground in one of the wires, a faulty instrument panel, or wrong mixture. One question I could not find answered though. If the connector to the sensor is removed and the terminals shorted, should the light stop flashing (mine does not)? If the light simply flashes when the resistance goes below a certain value then this would be so but maybe it is more sophisticated than that? Can anyone answer this?
>   Thanks,
>   David
>
>
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