Product review (2 stars): I improvised by using copper wire instead of the probe and it works great. It's been 5 months now and no block ...
On my Gladiator garage refrigerator, I couldn't make this work.  After attaching the probe to the defrosting element, I couldn't get it to bend at the necessary angle to fit down the drain tube.  I improvised by using copper wire instead of the probe and it works great.  It's been 5 months now and no block of ice in the bottom of the freezer.