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Testing Hot Tub and Spa Sensors

hot tub sensor

How to Test Spa Sensors for Continuity

With your electrical test meter set to 100k ohms, test the green and black wires for continuity.

Depending on the temperature it will give you a value. It is based on a 10k ohm resister. At 77 degrees it will read 10k ohms. As the temperature rises it will have a lower resistance and as the temperature lowers it will have a higher resistance.

Generally, all of the spa sensors will read 10-12k at 70 to 80F for resistance. If your readings are much less, this can indicate a break in the "Continuous" circuit, power not flowing through properly.

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Leslie’s makes every effort to provide accurate recommendations based upon current ANSI/APSP/ICC-5 2011 (R2022) standards, but codes and regulations change, and Leslie’s assumes no liability for any omissions or errors in this article or the outcome of any project. You must always exercise reasonable caution, carefully read the label on all products, follow all product directions, follow any current codes and regulations that may apply, and consult with a licensed professional if in doubt about any procedures. Leslie’s assumes no legal responsibility for your reliance or interpretation of the data contained herein, and makes no representations or warranties of any kind concerning the quality, safety, or suitability of the information, whether express or implied, including, without limitation, any implied warranties of merchantability or fitness for a particular purpose.