Our central heating pump has failed. Central heating is available upstairs, though not downstairs. I isolated the problem as a failed hot water circulating pump. Looked online for possible remedies and read that a gentle tap with a hammer might free the pump.
Well, well. I’m certainly skilled in using a hammer. However, a number of judicous hits with the hammer failed to solve the problem. I sort of knew it would fail, as the pump was too hot to touch, a sure sign that something has gone wrong inside the pump.
Never mind, I enjoyed giving the pump a whack or two.