Hi
I've an Ideal Concord CX60, open system, radiators and water heating - both pump fed.
Pilot light stays on, 3-port valve functioning, external thermostat on wall functioning, pump running (spindle is certainly turning).
Switch boiler on and it runs for 2 or 3 minutes then it shuts down; eventually it will come back on and repeat the cycle...
Problem arose Friday afternoon during normal operation when I noticed that the heating had gone off.
Thoughts:
Is it the thermostat in the heat-exchanger water-jacket that has developed a sudden over-sensitivity? Is the pump not really pumping and so the heat's not being shifted away from the boiler and the boiler 'stat is shutting down?
Other than that, I've run out of ideas.
Any suggestions gratefully received.