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as I said it gets hot so I assume it is but as its so quiet I cant hear anything even if it is running

I have a bog standard indirect system, 2 loft tanks cylinder, no 3 way port or motorised valves (unless they're under the floor ) and the pump is less than 2 years old and I only have one working rad, in the bathroom. I put the heating on a couple of days ago ( first time in months )...