Equipment for 2x defect (Update)

Today I am sending to Amazon already the 2nd model back. Even the replacement unit has held just 2 months. After that, the water heated simply no longer. Since the device returns immediately after switching (after about 1/2. Min.). Apparently a series misguided with the "heat control switch"?!?!

Someone wrote:
"However, the first unit has held just 8 weeks after the heating function continued sporadically well before the water was hot only repeatedly turning on and turning and turning ... (until the water was sometime last hot) helped even more -...> return. "

Tya, even when the device 3 The same problem with me. A Produn'ktionsfehler 1000%!