Don't know about those block heaters, but I've bought several of the orange-ish silicone pad heaters that go on oil pans, and I keep having a problem with the wire insulation cracking when it gets cold. The insulation apparently cannot handle temps below -25F very well, and we hit those temps often. Finally got to where I would clip off all but 6" of the cord, then splice in a cheap winter-grade (usually blue) extension cord while making sure any of the original cord insulation is well-covered in electrical tape. Seems to hold up well now.
I don't know if these heaters have a specific polarity or not, but I always take great care to ensure the wires don't get connected wrong. Don't think insurance would like it much if a heater pad caught fire because of my mistake! :shock:
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Today's Featured Article - Usin Your Implements: Bucket Loader - by Curtis Von Fange. Introduction: Dad was raised during the depression years of the thirties. As a kid he worked part time on a farm in Kansas doing many of the manual chores. Some of the more successful farmers of that day had a new time saving device called a tractor. It increased the farm productivity and, in general, made life easier because more work could be done with this 'mechanical beast'. My dad dreamed that some day he would have his own tractor with every implement he could get. When he rea
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