ma1

I have a 22 year old oil fired standard non-pressurised system with Drayton MA1 3 way valve and 'Lifestyle' connection system. A couple of years ago I replaced the old controller and some of the rad TRVs with the "Wiser" controller. Recently this started banging when going from mid position to...

User level: Novice I tried some lubrication with WD40 as described on some other forum, but the arm has not moved. The motor seems to make some movement sound every time DHW or Central Heating buttons on the control panel are switched on and off but the manual arm does not move, even when...