Mend > Home Heating Systems

combi boiler locks out after using hot water?

i have a potterton puma 80e combi boiler.after running hot water and turning the tap off the boiler makes a loud noise as if over heating and the system locks out,red light comes on.press reset and it is fine.does not seem to play up on the central heating side.

steve
January 2009

Potterton Heating, Home Heating Systems Boiler Locks Out Water

d.h.w. flow switch may be sticking,causing the boiler to stay on after tap is turned off resulting in the boiler overheating and shutting down.....this happened to me,i removed,cleaned and setup the d.h.w. flow switch and has been ok since...hope this helps.

Dale
November 2009

domestic hot water heat exchanger might be blocked with limescale.this in turn causes an overheat in the system.

a1
January 2009

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combi boiler locks out after using hot water?

combi boiler locks out after using hot water?

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