The pump is a grundfoss 15/50 it is makeing a lot of noise. also the boiler starts but there sounds like there is air in the system then after a few minutes the boiler shuts off.

benny, March 2009

sound like your pumps had it the noise you can hear is the water in your system boiling, un-screw the silver plug on front of pump at this point water will cum out so make sure you have a tub or towel to catch water, gently insert a small flat screwdriver into it if your pump if your pump is running youll feel it on the screwdriver, if not try and free it by turning the inner screw, if noy replace pump

STE, March 2009