london1a1
DIY
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Hi all (new here),
I recently had a boiler service and they mentioned that the wiring looks wrong. Boiler otherwise in good condition. I've seen similar threads and not sure my case matches so here goes. Previous owner installation so not sure who did the job.
System setup:
Myson controller for UFH and a Center controller for rads and HW. Valliant ecoTec plus 630 boiler. The rads upstairs do not have a stat and seem to be only controlled by programmer.
Symptoms:
Seems system is constantly calling for heat as boiler rad icon always displayed. During the night in particular the boiler turns on/off constantly.
Now, I've tried removing the 24v link from the boiler PCB and the UFH works fine, however the Center controller for Rads/HW no longer manages to call for heat (despite programmer on).
Looking at the wiring, it does seem like the switched line from the programmers to the boiler are connected together.
Attached pics of boiler PCB and setup. Happy to provide more details at request a d and help hugely appreciated.
Thanks
Jeff
I recently had a boiler service and they mentioned that the wiring looks wrong. Boiler otherwise in good condition. I've seen similar threads and not sure my case matches so here goes. Previous owner installation so not sure who did the job.
System setup:
Myson controller for UFH and a Center controller for rads and HW. Valliant ecoTec plus 630 boiler. The rads upstairs do not have a stat and seem to be only controlled by programmer.
Symptoms:
Seems system is constantly calling for heat as boiler rad icon always displayed. During the night in particular the boiler turns on/off constantly.
Now, I've tried removing the 24v link from the boiler PCB and the UFH works fine, however the Center controller for Rads/HW no longer manages to call for heat (despite programmer on).
Looking at the wiring, it does seem like the switched line from the programmers to the boiler are connected together.
Attached pics of boiler PCB and setup. Happy to provide more details at request a d and help hugely appreciated.
Thanks
Jeff