Three possibilities come to mind: First, there may be some foreign objects stuck between the sections of the coils where they connect or in their individual holes, the next is that the cord or outlet in your house is getting too hot (the circuit is being overloaded, perhaps; and finally, the clincher, you have a tiny oil leak in the coils themselves.
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Three possibilities come to mind: First, there may be some foreign objects stuck between the sections of the coils where they connect or in their individual holes, the next is that the cord or outlet in your house is getting too hot (the circuit is being overloaded, perhaps; and finally, the clincher, you have a tiny oil leak in the coils themselves.