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Hi, I'm not too experienced with heating systems, but our central heating pump is running when the hot water is being commanded from the controller, even if the heating is not turned on. It's making quite a racket (and getting quite warm). On a possibly related note, the Drayton mid-position...

I have 2 cold radiators (tall towel rails to be exact) which stubbornly refuse to heat up. I have an oil boiler and an F+E tank in the loft. The towel rails do not have TRVs, but have a lock-shield on each pipe instead. I started by bleeding all the radiators in the house with no effect...