I just installed a hot surface igniter on a nordyne unit. I couldnt find the exact one and all the numbers are washed off. so I retrofitted one that was close to that one. When I started the unit, the igniter glowed, then began to sizzle, caught on fire, and fell to pieces. Does nordyne use a special igniter, different voltages, or could it have just been a defective part? Any help appreciated.