- Joined
- 3 Mar 2008
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- 17
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mother in laws rads are playing up 2 sometimes work upstairs two sometimes downstairs pump seems to be working drained system refilled adding sludge remover left for 10 days drained flushed refilled adding inhibitor .two strange things happened after venting of rads i run boiler for 10 minutes then vented rads again but upstairs rads were drawing air in and the f'n'e tank was spilling out the over flow.had set the fov to a low level and water had'nt really got hot enough to warrant major exspansion, i jugged some water out and the level didnt rise anymore.when i drained down previously i shut off supply to cold water storage tank to check for a split coil but the level of water didnt drop ........vented dhw,open vent heating ,old looking floorstanding potterton......??????????????????????????