Larry, thanks for the encouragement.

A development this morning - with block heater plugged in I leaned over and listened close and heard what I would describe sounded like a tea kettle at low, low simmer. Then I unplugged it and sound stopped. Tried it with and without timer in the loop and always heard the sound. Does that mean it is working? I would think so, but then how come the valve cover does not get warm like it used to? One note, I have found antifreeze in the driveway recently after a night of being plugged in - could that have anything to do with it? Antifreeze still resevoir reads within safety.

Thanks,
Paul