Help, new boiler Valliant ecotec 837 fitted in October. Three times recently fault F22, opened valves to pressurise boiler fires up for heating but no hot water - dry. Is this air lock? What can I do, engineer not available until Monday. Installer not replying
Central heating is okay, just no domestic hot water - taps dry. Is it air lock? Why does boiler lose its pressure - fault F22 each day this week? Not good for new boiler.
Scole
You need to ensure that the filling link tap on the cold water side(right hand one) is closed, as when left opened and filling link is just shut on flow side(left hand one) then no water comes through the DHW side.
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