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home Fix label Heating label_important Home Heating Systems category Vaillant

how can i fix my vaillant vcw-gb-280h boiler?

i have no gas solenoid ignition there is no voltage to the soleniod in ch mode or dhw mode .All stats test ok pump is running diverter valve switching all switches are ok pilot light on possible thermostat board any ideas?
R.Anderson, September 2008
home Fix label Heating label_important Home Heating Systems category Vaillantdone
The gas valve is in series with the c.h. overheat stat which may be open circuit. This appears to be mounted on the main heat exchanger but if unsure follow the wires from the gas valve they may be connected via round plugs.

Ian, September 2008
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