On Mon, May 24, 2010 at 7:54 PM, Dennis Haynes <d23haynes57@hotmail.com> wrote:

> Burp tank!
> Now that is a new term. The only resistance you should measure is that of
> the coolant itself. No coolant, resistance should be near infinite. Most
> false triggers of the warning light circuit are not the fault of the sensor.
> First step is to remove the coolant sensor control from the relay panel.
> Ignition on the light should flash for a few seconds and turn off. If it
> stays on then the problem most likely is the dash panel.
>

Oddly enough, have noticed recently that my blinking coolant light
sometimes takes longer than usual to go off. The coolant gauge et al
is self installed (Thanks list!) and functions fine. But. Coolant now
~ 3 years old. (low miles though and this is with a Jetta engine)

I'm curious. As coolant mix gets old over time, would the change in
coolant chemistry affect conductivity of coolant? i.e. would a light
taking longer to turn off be a pre cursory warning that the coolant
needs to be changed? And, if one has added too much water, would a
mixture that's water rich cause the light to blink constantly?

Neil.

--
Neil Nicholson '81 VanaJetta 2.0 "Jaco"

http://tubaneil.googlepages.com/

http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-engines