Regency WH-U U41
Pilot light works fine. I can startup the main burner fine with the toggle switch, though I notice that it takes a couple seconds now where it used to be instantaneous. But, when trying to shut off it is slow to shut off with the toggle (the main burners) - and after it is hot the toggle switch can't EVER shut off the main burner. Have to shutoff the valve itself to turn it off, or the gas line valve itself.

Any ideas?

I would think this is a toggle switch failure, but the fact that it can turn on and then off when 'cold' leads me to think this could be something else.

Thanks!
Karl