Last time I went to use the block heater, I noticed a lack of "spark" when plugging the cord to AC power. Confirmed inoperative by touch-test after left plugged in for a little while.
I haven't trouble-shot it yet. Could be plug (hopefully), could be element.
Fortunately (yay), spring is nearly upon us, so I'm not desperate to fix it.
The forecast shows the sap should start flowing next week (days above freezing, nights below). I had a great winter, full of fun activities, but I'm ready for it to be over now.