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Checking the capacitance of the run capacitor. © Eugene Brennan
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I've
been doing a post mortem on my central heating pump. The shaft is
spinning freely, there's very little rust internally and just as
predicted, the run capacitor for the motor had failed, a part that would
have cost about €5 to €8. I thought the leads for the capacitor might
have been held by spring clamps, just like the power cable, but the pump
was facing inwards when in situ, so I couldn't get at them to check. It
turned out they were crimped onto the connector plug terminals. So the
replacement capacitor's leads would have had to be joined to the
existing leads, soldered and heat shrinked. According to the plumber,
the pump would have swivelled out for access and the threads aren't
sealed with Plumber's Mait, washers are used for sealing. So I'll be
fitting a new one myself the next time, or probably this one with a
replacement capacitor. (I've fitted two pumps before in the workshop).
