Worcester 230 going to o/h lock out oin DHW

[Gary w]

Morning Guys,

I have a Worcester 230 Combi in a rental property that is going to overheat lockout after a couple of minutes on DHW, no issue when on CH but if DHW is called for when heating is on same fault occurs.

System is clean as always had inhibitor so unlikely to be a blocked heat exchange plate but this is still possible.

Any ideas before I call in engineer.

Thanks,

G.

 

[ShaunCorbs]

If it’s only in hot water and the heating is ok either plate or pump aslong as you can heat over heating noises