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Weil McLain sensor issues and "None" status

eugd
eugd Member Posts: 71
edited December 2019 in Gas Heating
Going to replace my two supply and return sensors on the ultra 155 series 3 boiler. Do I need to use a sealant or just screw them in. Was getting errors on both sensors and now they just say none instead of giving a temp?

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  • eugd
    eugd Member Posts: 71
    edited November 2019
    Temp menu
  • eugd
    eugd Member Posts: 71
    so I changed the sensors and the return still says its missing. first I thought that the sensor was defective so I got another one and still says "none" on the status under the temp menu. the boiler is working for heat demand but still getting a lot of post purges?

    the boiler is a weil mclain ultra 155 boiler? what do I need to change the the U control module? or something else? thanks for all your help.
  • eugd
    eugd Member Posts: 71
    Anyone?
  • eugd
    eugd Member Posts: 71
    Update changed white the top sensor on the piping and now the return sensor is registering.

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