This is common problem. I would say its a design issue. This magnet piece (pair for magnetic sensor) can easily attract metal debris from your piping system. Soon it will not flow smoothly and get stuck either at down or up position. Worst if it got stuck at up position and your heater will keep on heading non stop until everything burnt out. Need to do preventive maintenance by frequently open and cleaning this piece. Note that this piece has up/down orientation. I am a user of Pensonic water heater which use similar design.
Salam tuan...kenapa lampu merah lampu merah pada suis tak menyala, bila saya cek pada wayar merah, hitam dan hijau semua ada elektrik, pada body water heater itu.
Hot water is coming. But if the current plug switch is not off water is heating up to boiling point. What would be the problem? My heater worked very well for over 15 years. It is 606 model. I am from Sri Lanka. Can spare part be found??please help. Thanks.