my electric heater failed to work since 26/11/2017 due to electric failure and I have contacted the call center of El-Araby group(19319) and give a clear description of the fault, then the maintenance man attended to my home 27/11/2017 at 5 p.m and check the failure of the heater then tell me firstly that relay system obs-elate and the shape of the electric monitor will changed, secondly that this spare part not available and with in few days they will call me from the previous description, it is very clear that there is no trouble shooting system used, and EL-Araby group run any modification with out inform the customer, also since 26/11/2017 untill now i live without hot water in my home in this winter days. so I think very well before buying your products futurely thank you. my egyption mobile [protected] ) my E-mail([protected]@yahoo.com)