On Saturday, 24 June 2017 21:05:13 UTC+1, T i m wrote:
On Sat, 24 Jun 2017 20:20:18 +0100, (Roger Hayter)
wrote:

snip

Assuming it doesn't have brushes,

It doesn't Roger, an AC 'synchronous motor' I think they call them.

I don't think it can be. Sychronous motors lock to the mains frequency. Fan motors have slip.

and your continuity tests included the
switch,

They did, and without (just in case). I also forgot to mention there
was a sort circuit between neutral and one side of the run winding.

about the only thing you haven't excluded is shorted turns.

And I think that would be difficult without knowing the original
resistance of the windings.

And possibly capacitor breakdown at mains voltage, so it's worth trying
the new one.

Check. It should be here on Monday. ;-)

Cheers, T i m

someone needs a junkbox.


NT