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Steam Element Ohm Testing

Major VersionM

by randy@lamarzocco.com

  1. Turn the module's power switch to the off (middle) position. Using the 2.5mm hex wrench or #2 phillips screwdriver, remove the 6 screws that secure the right side panel, and then remove the panel from the module.
    • Turn the module's power switch to the off (middle) position.

    • Using the 2.5mm hex wrench or #2 phillips screwdriver, remove the 6 screws that secure the right side panel, and then remove the panel from the module.

  2. Set your multimeter to ohms. Multimeter function will vary depending on type and brand.
    • Set your multimeter to ohms. Multimeter function will vary depending on type and brand.

    • For auto-sensing meters, simply set the meter to Ω.

    • For manual meters, set the meter to 200Ω.

  3. To measure the resistance of the heating element, the module's power switch must be in the off position. Next we need to check the resistance between both wires coming from the heating element. Depending on the wiring configuration, this can be checked in two places.
    • To measure the resistance of the heating element, the module's power switch must be in the off position.

    • Next we need to check the resistance between both wires coming from the heating element. Depending on the wiring configuration, this can be checked in two places.

    • For modules manufactured prior to 8/1/2014, we will touch the multimeter probes to both connections on the terminal strip, as shown in the first photo.

    • For modules manufactured after 8/1/2014, we will touch the probes to both thermal reset leads, as shown in the second photo.

    • The red and black probe can be reversed in this scenario, as measuring resistance does not rely on polarity.

  4. While measuring the resistance, the value on the display may float for several seconds. Once the value stabilizes, it should read between 20-26 ohms on a 220V machine.
    • While measuring the resistance, the value on the display may float for several seconds. Once the value stabilizes, it should read between 20-26 ohms on a 220V machine.

    • If the value is out of this range, please contact Modbar customer support, as the heating element may be damaged.

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Modbar Support

Member since: 07/22/2014

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