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In article ,
(dsb0118) writes:
My central heating pump isn't working. It goes round but you have to
flick the rotor with a screwdriver each time to get it to start.
Following advice from other posts on this group I thought it might be
the capacitor but the problem is the pump is hard to get at and when I
levered the capacitor out, it came out wires and all before I could
see where the wires came from.

Test the capacitor by connecting it in series with a 40W
lightbulb. The lamp should come on dimmer than normal. If
it doesn't come on at all, the capacitor has gone open-
circuit, and if it comes on full brightness, the capacitor
has gone short-circuit.

The pump is a Grundfos UPS15-50x18. There seem to be eight holes
numbered 1 to 8 which you can push a wire into. Nos. 1 and 2 are
already joined by a wire link so I'm guessing it's not those but which
of the other six do I use?

All advice gratefully received.

Also. Does any one know where to get a replacement capacitor from? I
live in the Reading area.

You could try "The Shop on the Bridge", an electrical shop
in Oxford Road just after the Dixons/Halfords/MFI/PizzaHut
shopping centre as you drive out of Reading. Check the
rating you need in µF, and ask them for a fluorescent
lamp power factor correction capacitor with the nearest
rating (value isn't very critical). I haven't been in
there for a long time, but they used to do these when
they were still in Kings Road some time ago.

If you have a fluorescent fitting somewhere in the house,
you could even steal the power factor correction capacitor
out of it (unless it was a cheap Wickes one or similar,
in which case they never bother fitting them in the first
place;-)

--
Andrew Gabriel