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Newbie with Central Heating Pump Snags??

Postby subgriff » Sun Feb 08, 2009 9:12 pm


I have what I consider to be a "standard" (but Oil Fired) C/H & H/W system, my hot water is fine no problems. My C/H however, is not; I noticed a louder than usual noise from Pump (possibly Grundfos Selectric UPS 15-50, located in airing cupboard with boiler) and switched off C/H to investigate, now pump does not start when C/H switched on, despite bleeding (there was some air in rads and pump, now gone). I strongly suspect I have a broken pump but before I call someone to come out (replacing pump beyond my skills (and tools!)), can anyone offer any advice? Searching forums I haven't found anything related.


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Simply Build It

Postby plumbbob » Sun Feb 08, 2009 10:26 pm

With the power off, remove the big screw on the end of the pump to expose the rotor shaft (some water dribbles out). Fit a large flat blade screwdriver into the slot in the rotor end and turn the pump by hand. Does it feel free or is there signs of bearing wear?

Switch the boiler on. Does the shaft spin? If not, try giving it a helping hand.
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Postby Steve the gas » Mon Feb 09, 2009 5:34 am

Not really - get it replaced.

Some hit pump to get 'em going a bit longer but it sounds fubar
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Postby subgriff » Mon Feb 09, 2009 7:26 pm

Steve & plumbbob,

Thanks for your advice, very grateful - for info I have taken both bits! Pump now working after a spin and a little help but still noisy so have ordered a replacment to be fitted in next week or so.

Thanks again.

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