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Can anybody provide schematic diagram for Vaillant combi boiler VCWA180XE?

I have some problems with heating water temperature regulation on my boiler. The heating water temperature can not be regulated with potentiometer mounted on the boiler. As I have some expirience in repairing electronics I want to try to repair that problem, but I can't find schematic diagram for Vaillant Combi boiler VCWA180XE, so please somebody send me that diagram.

Darko Kozic
December 2005
VaillantHeating, Home Heating SystemsCombi Problems Water
for information

annibale bellini
April 2008

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