Had a boiler installed about 1.5years ago by a corgi enginner recently realised that the pump seems to run all the time even when the programer is switched to off for hot water and central heating? it only stops when I isolate the power the system has two seperate zone valves and room stat.The programer is positioned in the airing cupb with the pump close by. The boiler is a worcester Greenstar cdi conventional positioned in the kitchen.Anyone got any Ideas whats going on with the wiring and what I could do to correct it! the plumber/ heating enginner is not interested in coming back to correct the problem so Id like to try to sort it myself!!.

