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Hot water

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Postby how2 » Fri Nov 20, 2009 3:13 pm

Hi all

I have a Vaillant Turbomax VUW 242/1Ecombi

The Hot water only comes on when the taps are open on full blast. When I open it slightly the boiler does not light up.

Only when I open the taps fully does the boiler light up.

Central heating is working fine.

whats wrong

thanks all
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Postby DEEARR2 » Sun Nov 22, 2009 9:16 pm

Movement of the domestic hot water through the Valliant boiler is monitored by a aqua sensor(flow generator) or a flow switch which signals the gas valve, at a predetermined minimum flow rate, to open. This would be the first thing to be checked. However, qualified gsr engineer required for any repair
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