2 of 4 defective Have the heating heat uncontrollably

These products are really great - if they work for. 2 of 4 ordered were running normally after a first impression, but turn out to be after just one month as defective, either because very often appears the error E3 (then heats the heating constantly on, no matter what temperature it (more on that !)). Alternatively, the thermostat may not turn properly, so in the "Off" setting the heating is still heated neat! Thus one skin so beautiful coal out!

I have both defective thermostats long enough observed, also all newly installed, new batteries etc. and letzendlichen evidence it reached to put the other 2 thermostat: the always worked properly (and so far without errors). The other faulty run on each heater with the same errors. I was just several days not in the apartment and had festellen that I have 25 ° C, although the thermostat Video- set at 15 ° C the correct functioning leaves the heating cold, the broken not even display an error message but ballert heating without end!

Conclusion: Well, if it works, but at 50% error rate absolute crap under the aspect of "energy saving".