I thought I had read that an improper mixture could also cause the light to
flash?

> At 11:57 AM 11/18/2002, Dylan Friedman wrote:
> >Hello All,
> >I've been watching this heater discussion and wanted to clarify the
> >purpose of the LED on the coolant temp. gauge.  It has been my
> >understanding that the LED would blink when the coolant level in the
> >expansion tank was low, not when the temp. was high.  Just curious.
>
> The light (when working properly) blinks for a few seconds any time the
> gauge receives a signal that would cause it to read full scale (even if
the
> signal is only very brief).  This happens either when the temp is too high
> or when the level controller detects that coolant in the tank is low and
> sends a high-temp signal to the gauge.  Depending on the controller, it's
> either a continuous signal or a pulsed one that doesn't noticeably move
the
> needle.
>
> Note that the owner's manual specifically says that a high gauge reading
is
> still normal operation unless the light is blinking as well.