Hi guys, So my previous problem was the over run pump constantly running, the PCB was to blame and fitting a new one resolved this issue. http://www.diynot.com/forums/plumbing/heating-pump-constantly-on-y-plan-help-needed.314037/page-3 Now the heating pump doesnt work! power is going to the wires, i even checked the wires going into the pump and the correct volts are there. The only thing that has changed is i have a builder fitting my kitchen, the control panel is hanging off the wall but is powered on. Not sure if he shorted something but power is going through, boiler fires up as normal but the heating pump is not powering on, tested with hot water and central heating, i turned hot water on only earlier and nothing, had to use the immersion for the shower. So is the pump dead or is there something else I can check for before calling in the experts?