On Sat, 24 Jun 2017 20:20:18 +0100, (Roger Hayter)
wrote:

T i m wrote:

On Sat, 24 Jun 2017 11:01:33 -0700 (PDT), wrote:

snip

Normally these things use a squirrel cage motor plus 2 series caps for
speed reduction.


Very sure this is stock and deffo only one cap.

It's one of these (not Clarke particularly).

https://www.machinemart.co.uk/p/clar...hrome-floor-f/

Cheers, T i m

Assuming it doesn't have brushes, and your continuity tests included the
switch, about the only thing you haven't excluded is shorted turns.
And possibly capacitor breakdown at mains voltage, so it's worth trying
the new one.

Well, after a bit of a faff (cap didn't arrive) I ordered another from
elsewhere, put it on and nothing. ;-(

The fan still 'hums' slightly when power is applied, like a coil is
getting power but the motor not spinning?

The strange thing is previously, if the fan left (for say a couple of
days) and you turned it back on again it would actually spin up ...
but then slowly slow down and stop again.

Strange ...

Cheers, T i m