This can be caused by a leaky capacitor inside the temperature gauge.
It's not easy to get to (changing gauges is easier) but the gauge face
can be removed (requires drilling) and the tiny wires unsoldered so that
the circuit board can be removed ... then turned over exposing the
capacitor.  Replacing it with a tantalum capacitor can be a permanent fix.

Mike

David Clarkson wrote:
> Has anyone had this same flashing coolant light symptom only during cold
> weather? My van has done this the past 2 or 3 winters when the temperature drops
> down below freezing. No leaks, proper mix of VW (correct) coolant and all
> connections secure and clean. I can start/stop the van or simply switch on/off
> the ignition 5-7 times and the lights will quit flashing. Any ideas from the
> list? Thanks.
>
> David Clarkson
> 90 Westy (244k)
>
>
>
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