Regards the coolant itself, somewhere I read that if the coolant is not
kept close to the 50/50 mix specified in the manual you can get a
blinking red warning light. Seems reasonable to me.

John Rodgers
88 GL Driver

Leon Korkin wrote:
>
> Those sensors will last and work a long time if occasionaly pulled out and
> cleaned(those 2 metal pins with very fine sandpaper). The old coolant will
> also make them fail(blink), time to put in fresh coolant.
> Leon
> 85 Subwagen westy
>
> John Rodgers wrote:
>
> > 99 chances out of a 100 it's not the gage but the sensor in the
> > expansion tank. They go bad all the time, but I have never heard of
> > anyone haveing to replace the gage in the instrument cluster. That would
> > be a real PITA. The sensors are cheap, less that $10 I think, brand new,
> > from the Ron Salmon or Ken Wilford, and others. I have had so much
> > trouble with them I keep a spare amongst my spare parts in my
> > maintenance and emergency road kit. You might want to try replacing the
> > sensor unit before doing anything more.
> >
> > John Rodgers
> > 88 GL Driver
> >
> > > George Averill wrote:
> > >
> > > I need some ideas for replacing the temperature gage that contains the
> > > red blinking light that indicates low water in the water reservoir.
> > > This has been an ongoing problem for several years.  Now I am working
> > > on it again.
> > >
> > > In the past, I have replaced the gage with a used one that worked
> > > several months then quit.  Then I replaced the gage with one from VW
> > > which lasted about six months.
> > >
> > > My questions are:
> > > 1.  What sources are there for replacement gages?  (Does anyone stock
> > > them besides the dealer?)
> > > 2.  Has anyone built a separate water level gage to bypass the one
> > > that came with the vehicle?
> > > 3.  Any ideas why the gages keep going bad?
> > >
> > > Thanks in advance.  If you send a reply to this message, please send
> > > it directly to me by e-mail so your reply won't get lost in all of the
> > > many messages on the site.  I have a hard time reading all of them.
> > >
> > > George
> > > 84 Camper
> > > Columbus, GA
> > >
> > > P.S.  The rear water heater core is in and working great!  The
> > > replacement was a snap; no trouble at all.  Thanks to all who
> > > responded with help.