The pressure in the heating system dropped to zero due to a leaking rad. I fixed the leak, pressurised the system and bled the rads. The heating works fine and HW is OK but only when the heating is on. When the heating is off and a tap is turned on there is no HW - any ideas?
Valliant combi - no HW
- Thread starter DA
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Sounds like the flow switch, but see this as well:
http://cgi.www.a1-gas.co.uk/cgi-bin....cgi?getsubject=1769&script=question&frames=N
http://cgi.www.a1-gas.co.uk/cgi-bin....cgi?getsubject=1769&script=question&frames=N
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