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Temp gauge misreading?
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kmsconstruct54
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Joined: February 26, 2015
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Location: Richmond, CA
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PostPosted: Thu May 28, 2015 6:45 pm    Post subject: Temp gauge misreading? Reply with quote

On my way home today, I was sitting in traffic and noticed that my temperature was not as hot as it should be. I live in the SF Bay Area. Generally my temp gauge, at cruising on highway stays just under the LED to right in the middle. Unless I'm in traffic at which point it rises to about 2/3rds and I can hear the high fan come on. I've never had an overheat.
Today while in stop and go traffic, doing between 0 and 20-25, I noticed that my temp gauge was just below the LED where yesterday it would have been around 2/3rds. Fan still came on.
I brought her home let her cool for a bit then started her up. Low fan came on just before the LED and high fan came on towards the end of the LED.
Anyone?
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Ahwahnee
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PostPosted: Thu May 28, 2015 7:09 pm    Post subject: Reply with quote

Does sound like the gauge is lying to you. I suspect the sender is more likely the culprit than the gauge itself.

Somewhere on the Samba are the values for testing the sender.
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ohhorob
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PostPosted: Thu May 28, 2015 7:11 pm    Post subject: Reply with quote

Have you noticed a change in the Gas gauge too?

If both are indicating differently, you may have a faulty voltage regulator inside the instrument cluster.

Search showed up this thread for testing the Temp gauge.. http://www.thesamba.com/vw/forum/viewtopic.php?t=464113&start=0&postdays=0&postorder=asc
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kmsconstruct54
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PostPosted: Fri May 29, 2015 11:57 am    Post subject: Reply with quote

My fuel sender has been out since I've owned the van so I can't honestly tell you if the fuel gauge is acting up. Just haven't gotten around to dropping the tank. Seems like it's always full of fuel everytime I think about doing it!! Haha!
I'll start with the values at the temp sender.
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dhaavers
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PostPosted: Fri May 29, 2015 1:22 pm    Post subject: Reply with quote

SF area?

Don't count out corrosion right @ the sender connections from the refreshing sea breezes... Rolling Eyes
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kmsconstruct54
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PostPosted: Fri May 29, 2015 10:59 pm    Post subject: Reply with quote

Yes Bay Area. I haven't noticed any real corrosion on any of the grounds or anything. Are you saying at the wire connection or at the actual threads?
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hdenter
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PostPosted: Fri May 29, 2015 11:19 pm    Post subject: Reply with quote

If you have a 1.9, the sender for the gauge just has a single wire clipped on to it(not sure what the 2.1 has). it is very common for that connection to get corroded. Pop the wire off, clean the two surfaces, make sure there is a firm connection and see where that gets you.

Hans
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dhaavers
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PostPosted: Sat May 30, 2015 6:50 am    Post subject: Reply with quote

2.1 sender:
Image may have been reduced in size. Click image to view fullscreen.


Connector (pic courtesy of Alistair):
Image may have been reduced in size. Click image to view fullscreen.


FWIW: My gauge started drooping shortly after I got the van - I found the sender with
no connector and no boot, corroding away quite nicely... Rolling Eyes I cleaned it up, wrapped
with tape & slathered on liquid vinyl & it's been dead on for the past 4 years. Cool

Which reminds me...anyone have a nice spare temp sender connector with boot laying around...??? Embarassed

[Back to topic] See what's going on down there & give us a report...
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