Testing a Thermopile on a Water Heater

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How to test a thermopile's voltage using a multimeter. Pilot light keeps going out? A faulty thermopile may be at fault. Acceptable range for most water heaters is around 400 mV for an open circuit test. A healthy thermopile usually produces anywhere from 600-750 mV.

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Thermopile 100112328: https://geni.us/9ho3eVo
Thermopile Assembly 100112330: https://geni.us/n6FHWNE
Multimeter: https://geni.us/6064h

Thermopile Replacement on a Water Heater
CLICK HERE: https://youtu.be/1VIvEqVbt14

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Related article summary

The article explains Honeywell hot water heater status light blink patterns and their meanings, diagnosing one- to four-blink codes and continuous blinking. It provides safety-first troubleshooting steps (pilot relight, sensor checks, vent clearing, thermostat adjustments), a gas valve knob reset procedure, preventive maintenance tips, and guidance on when to call a professional.
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