Well here we are that time of year when the heating needs to work efficiently!
The Alpha has been providing hot water very efficiently throughout the summer, just as it should.
However come the Winter and we need some warmth...
The Alpha heating fires up each morning as it should and provides a nice warm house, until........there is a demand for hot water. Hot water flows as it should but on turning off the hot water the heating does not function, result cold house .
The thermostat is making a demand for heating but...nothing.
However if the system is turned off for 15 minutes (15 not 10) and then turned back on the heating works as it should!
Those are the clues, diverter replaced last year by GSR engineer who was flummoxed by it not solving the problem. Need advice to give to GSR engineer to help solve the problem.
Over to you experts......