Hi I've noticed that the pump on our central heating system has started running constantly even when the heating and hot water is off on the programmer. It has done this before but as the house was brand new the work was carried out for us by the installers for free. We have been in the house well over a year now and the builders say they aren't obliged to fix it again. I'm pretty handy with domestics just wondered if there was anybody who could point me in the right direction before I start. The system is not a combi boiler but a boiler and water tank set up. Any help is appreciated thanks!
