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Hi , it could be either. First I would bypass the room stat within the boiler wiring centre.this will run the heating . connect a small wire between ls and or. If the boiler runs the heating fine then the problem will be with the stat.
If you have a multimeter electrical tester then you could simply see if you have power to lr
Hi , the boiler case needs to be removed. To access the wiring centre.there will be two screws at the top and two at the bottom .the case then pulls off . then a screw holds the wiring centre/ control facia , remove this screw , this will drop down .
Hi , I was out , my apologies. How do you feel about taking the case off ?
Hi , wire between Ls and Lr, thanks . boiler will hopefully run confirming a fault with the stat
Hi ,it may be that the diverter valve is stuck, or the head motor is not moving it across.or could be a PCB issue. To check, to the right o the pump us the diverter valve with the motor on top (will be a lead running to it from the board . If you take the motor head off ,reset the boiler and watch for movement from the inside of the motor head. If no movement then either the head is faulty or PCB, ( would need a multimeter to confirm
OK , thats good , I'm beginning to think it may just be the flow stat. Hopefully i this and not tge pcb .Pretty easy to change. It may be that is its faulty and not recognising the need for heat . Relatively cheap and easy to change . Flow temperature sensor - (NTC) 8 716 106 688 0 GC No. H26 542
Yes , that does make sense , maybecvthge diverter was getting stuck , that's great , all the best . Toby
P.s , would you mind rating me , thanks