Radiators do not fill after replacing valves.

Postby Gordon White » Fri Aug 28, 2009 12:11 pm

Replaced radiator valves, switched on water, header tank fills ok but not the radiators - no hissing when I try to bleed. All lockshields and valves are open. Any suggestions?
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Simply Build It

Postby htg engineer » Fri Aug 28, 2009 7:40 pm

Blocked cold feed or airlock, turn on central heating for 2 or 3 seconds, see if the pump clears it.

You could backfill with a hose connected to a radiator valve or drain point.

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