Date:         Sun, 15 Dec 2013 17:21:35 -0500
Reply-To:     David Beierl <dbeierl@ATTGLOBAL.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David Beierl <dbeierl@ATTGLOBAL.NET>
Subject:      Re: temp gauge
Comments: To: Dean S <predsmaniac@GMAIL.COM>
In-Reply-To:  <CAEqALmrYTxxY+bF9EP8cqUso1ea-wmudxnNaHZBsxXn7mYb0MA@mail.g
              mail.com>
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At 10:22 AM 12/13/2013, Dean S wrote:
>Hello all;ok I have the wacko flashing temp gauge syndrome which magically
>showed up  after a coolant flush...and replacement the coolant used was
>Pentofrost SF....My guess its either and air pocket or a fill level issue.

You don't have to guess.  Stick a flashlight up to the pressure
bottle and you can see the level if it's down.  If it's below the MIN
marking the gauge should flash.

IF this is the case, when you turn on the ignition you'll get the 2-3
second flash which will then stop.  A few seconds later it will start
up again and continue.

If you get constant flashing from the instant of key on, it's likely
the gauge or maybe the controller.  Unplug the controller (42 or 43
painted on it).  If the gauge keeps flashing it's bad panel voltage
or bad internal gauge capacitor.

If it stops, plug the controller back in.  If it starts up instantly,
bad controller.

If it waits a few seconds to start up, key off, unplug the sender at
the pressure tank and short the contacts of the connector, then key
on.  If it still blinks continuously you've got open wiring somewhere
between ground and the controller.  If it doesn't, you've got bad
contact at the sender connector or dirty sender pins or conceivably
coolant that's too strong or too weak.

Yrs,
d