One Last Thing. If a Person is Dry Burning to Clean the Coil, or to Check for "Hot Spots" or "Hot Legs" there Isn't really a lot of need to Heat the Coil past the point of being able to see a Faint Red Glow at the Center of the Coil. Once no Smoke is coming off a Coil, it is as Clean as it ever is going to be. And once you can see that the Center of a Coil is starting to turn Light Red, you are pretty much Good to go. I would also suggest Dry Burning at a Low Wattage like 10 ~ 15 Watts. Doing This is Extreme Overkill IMO.