If you turn off the electric supply to programmer for two minutes ,does the motorised valve return to domestic hot water position ,and if you then turn power back on and select hot water only,does boiler fire up to heat hot water cylinder ?
This is what you posted at 8.51 today.it seems that somehow the valve gets stuck at M position, so the boiler does not fire up even though the heating is ON in the programmer. Any temporary fix? The BG engineer appointment is in 2 weeks. thanks.
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