Hot water OK but no C.H?

the quick fill loop generally is connected to c/h flow/return & then to the main. but should only be connected while fillng boiler.remove once filled. because of contamination. put hose on c/h flow/return whichever has connection & just open valve & release pressure ,remember for boiler to be off.take down to nearly !/2 bar to 1 bar that should be adequate enough. it may be going off at high pressure /high limit
due to no movement of flow.

gary
March 2008

firstly check that the pump is running. just take a screw driver & place the tip of the screwdiver on the centre othe the pump. usually on the venting screw located on the face of the pump. & the handle end to your ear. this will detect any vibration from the pump. if not just turn the vent centre screw anti clockwise until detached, it is common for water to come out of this hole, so dont worry, youy can then see if pump is turning. but it also sounds like your diverter valve has gone.

gary
March 2008