allon, your point is very well taken.

What I was thinking about, perhaps in a fuzzy way, was the solid state relay. I am certainly not knowledgable enough to be certain as to whether there is directionality to solid state devices such as this (with load and control sides specified in Eric's schematic).

Thanks
Marty

An A/C device, on the load switching side, is not polarized. The control side if D/C is.
KDM

Eric-

I'm pretty sure the water level sensor switch is gone, too.

1) With proper polarity at the terminal strip, there is no heat with the sensor switch in the circuit and heat with it jumpered out of the circuit.

2) The float rises properly with the water level in the tank, so it's not that problem. Nor can I get the heating element on by unscrewing the sensor switch, then slowly moving the sensor switch up or down on the surface of the cover to which it's normally mounted (I gather that early versions of the Anita sometimes had issues with the magnet inside the float dropping to the bottom of the float itself, out of the range of the sensor).

I'll know for sure tomorrow; it's a happy artifact of living in Boston that free UPS ground arrives from Albany the day following an early morning order.

Thanks again
Marty

In what probably isn't a surprise to anyone - a new heating element resolved all the problems. After 5-6 years it was likely just time.