VAILLANT ECOMAX VUW 824 824/2 828 828/2 835 E 1 relay 734678 PCB 130826 Condition is Used.Taken from a working boiler PLEASE MAKE SURE ITS THE RIGHT PART NUMBER BEFORE PURCHASING Please note if when fitted f70 code is displayed the Pcb is not faulty but needs programming to your particular model which you can you tube how to do
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