Why does the water heater turn itself on and off?

Igor asks:
Hello! I have installed a Polaris PS 50 V water heater for 3 years, I began to notice for a long time that it turns on every half hour for 2-3 minutes and off. myself, although the temperature switch is turned to zero and I do not want him to heat the water! Is it a breakdown or such a mode of operation? It is especially unpleasant when it turns on spontaneously during a shower, I am afraid of electric shock. thank
The answer to the question:
Hello, was this the case from the beginning or did it really become after some time? If the second option, then I believe that the regulator has worn out (it's a switch). You can try to disassemble and clean his contacts, if necessary, bend. If you do not understand - just unplug from the outlet. So it really shouldn't work. Disabled - means disabled. Although this may be a feature of your model.
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