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MM 15E

HeatJockey
HeatJockey Member Posts: 37
in THE MAIN WALL
Has anyone else experienced problems with the MM 150E probe type pump controler/LWCO? We had 2 "out of sequence" problems in the first 2 months (MM recommended cleaning the probes) then 2 cracked sections, front and rear, of a brand new cast iron boiler. The boiler is clean and never had chemicals added to the system. MM tested the control and says that it works fine, however I have photographs showing "green" lights and continuity from the LWCO contacts when there is no water in the gauge glass.

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