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zoro4's avatar
zoro4
Explorer
Sep 20, 2013

Aftermarket water temp gauge reads low due to wire length

I'm working on a rear engine RV and installed a new water temp gauge and I noticed it's reading low by atleast 10*F. Called the gauge supplier and they assure me it's due to the long wire length but t...
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zoro4's avatar
zoro4
Explorer
Sep 20, 2013
Executive wrote:
If they're saying it's because of the wire length, what they're really saying is the wire GAUGE is too SMALL. If you're using 18ga, bump it up to 14ga. If 16GA bump it to 12ga. You could also use a relay if you've already wired it.....Dennis


Dennis-
Running 18ga wiring.

How would a relay help me out? The gauge measures resistance across a thermocouple and the long run of wire is between the thermocouple and gauge.

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