I had mine plugged in in the street last winter and the extension cord has an iron grip on the plug, and it had ice melted (and re-frozen) over the connection and salt spray on it, and I got SHOCKED when I tried to pull it apart. :eek: Not that I have never been shocked, this was probably my 9th time on 120. (only once on 220 for me...) :D It was a pretty long shock though, my right arm hurt for a few hours afterwards....ah, the joys of having a diesel in winter! :P

Now I park next to our garage, and installed an outlet on the side of it, so I can unplug the cord there first (very easily) before I mess with it on the car. :D

Umm you should of course always unplug the cord first before unplugging it at the block heater, and make sure the outlet is on a breaker so if it does short its not a big deal... just a suggestion...:D

Oh and use a heavy duty outdoor extension cord, not the cheap crap you get at Walmart...not to mention your block heater cord should be pretty recent and inspected for wear every season...

And stow the extension cord safely before using the snow blower. Failing to do that, make sure you have extra shear pins for the snow blower on hand. DAHIKT.