First off, let me say thank you so much for pool school! I have learned so much and my pool is looking better than it has in years and with significantly fewer trips to the pool store and way less $$!!!!
I have my Tork mechanical timer set so that the pool pump operates between about 10am and 7pm every day. It has been working fabulously. This afternoon, I went out to do some pool maintenance. There was some debris in the skimmer basket, so I went to the timer to use the manual off switch to turn the pump off (as I have done hundreds of times). When I pressed down on the off switch, the pump powered off, however when I released pressure from the switch, the pump came back on. I pressed down on the ON side of the switch until it clicked and then tried the OFF again and got the same behavior (I did this several times actually). I tried re-setting the power breaker to see if this might have an effect, and it did not. Its like something with the OFF switch is not catching, whether I am pressing on it manually or whether the timer tripper is activating it, once the pressure is relieved the pump comes back on. I cannot find any pieces in the bottom of the housing box - looking to see if maybe something broke and fell off.
Any advice on how I might fix this? Here's a picture of what the mechanism looks like: