it's cold here!!
Summary:
Boiler seems ok - supplies hot water for HW storage cylinder.
No response ( from boiler ) to demands for CH
3 way Valve seemed to be sticking so replaced - when I removed old valve it was very stiff - could not move ( with just fingers ) to or beyond HW+CH
Still no response or brief response when CH demanded ( Wireless room stat briefly lights and valve responds but only for a second ... power to white ( B&W) wire in junction box)
grey wire in junction box has power when CH & HW off
forcing some hot water round CH circuit by manually moving to latch position lever on valve actuator ( HW +CH position ) and turning cylinder stat up to keep boiler firing for longer
Anyone any ideas what is wrong / how to fix?
Summary:
Boiler seems ok - supplies hot water for HW storage cylinder.
No response ( from boiler ) to demands for CH
3 way Valve seemed to be sticking so replaced - when I removed old valve it was very stiff - could not move ( with just fingers ) to or beyond HW+CH
Still no response or brief response when CH demanded ( Wireless room stat briefly lights and valve responds but only for a second ... power to white ( B&W) wire in junction box)
grey wire in junction box has power when CH & HW off
forcing some hot water round CH circuit by manually moving to latch position lever on valve actuator ( HW +CH position ) and turning cylinder stat up to keep boiler firing for longer
Anyone any ideas what is wrong / how to fix?