On Tue, 17 Sep 2019 11:38:10 -0500, Mark Lloyd
wrote:

On 9/16/19 9:47 AM, Clare Snyder wrote:

[snip]

On a "snap action" switch remaining in the off position would
constitute a switch failure.

The ones I've seen are not switch failures, but balancing the switch at
the point where the spring forces are equal
.. Not possible on a properly functioning "snap action" switch.
Perhaps on a "silent" switch - but even then I'd be questioning how
long the switch was going to last. Snap action switches generally
outlast the silent type significantly.(they don't arc)

BTW, I could duplicate the situation here, although it took a few tries
to get one of the switches in the middle position that it's not supposed
to be in.