The pump on my combi boiler keeps seizing,if i un screw the bleed screw on the front ant turn the rotor it feels notchy as though the bearings are seizing,once i have freed it up it fires up but the next time i turn the boiler on it does it again.This is the second new pump i have fitted in 3wks!

lee2222car, February 2011

if it's the full pump you've fitted maybe just unlucky if it's only the pump head check it's the right one

brian, February 2011