Fredxxx wrote:

On 28/11/2016 10:37, mechanic wrote:
On Mon, 28 Nov 2016 01:26:40 -0800 (PST), David wrote:

I agree entirely. From the sound of it, though, the OP (and
British Gas) are well on the way to eliminating the likely
scenarios, so I thought I'd chip in with something more unlikely


That's exactly right. BG are not idiots.

Some are. Like one who got the CH pump in the wrong way round.

Easy to do. My combi boiler pumps water downwards, which is not good
for the pumps. Reversing the pump was especially unsuccessful because
of the non-return valve en route. It may have been a bad idea for other
reasons, but I will never know.


--

Roger Hayter