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Took out the large screw in the front of the pump a slow trickle of water started to come out, initially with some black iron oxide particles (only a few particles). I switched on the central heating system. The pump made a noise and the pipe to the radiators upstairs was vibrating, assuming...

Did as you suggested. Rads vents and hot water cyclinder all giving out water and no air. The pump valve when opened only gave out a meagre amount of water (a drop formed on the valve). When the valve was open I switched on the boiler to see what would happen. Funnily enough the boiler fired up...

Thanks Mick. I'd switched off the the system and made sure it's not timed to come on again until problem fixed. Good to hear it isn't likely to be the boiler. Sorry to ask a daft question but I take it that in order to check that the cold feed is blocked or not, I'd need to disconnect the cold...

Drained water from central heating. Put Sentinel x400 (cold spots in radiators - not air) into FE tank and filled up the system. Switched on boiler. Lockout light - red, Burner light -flashing, Mains light - on. Radiators not heating. Pump very hot to touch. Info on boiler flap says that the...

I've checked the fuse. It had blown. I replaced it but the new one failed. Did it again with the same result. Any ideas on how to proceed?

Hi Corgiman Havn't checked the fuse because I don't know wherte it is located on the boiler. I'll switch off main fuse and go have a look.

Have a Baxi WM 51/3RS boiler. Pilot light on but timer not moving. Is this a fuse problem? If so can it be fixed easily or do I need a professional? Any help would be much appreciated.