Rick:
Appliance production, like automobile production, halted completely for civilian sales during World War II, beginning with the establishment of the WPB (War Production Board) in February, 1942. That, however, was civilian sales; some makes and models of various consumer durables were still made for military/government use. All three automakers supplied some cars to the military and government, and Bendix made its famous front-loading automatic all through the war; the Armed Forces found it to be a superb machine for use on bases and ships. Most manufacturing capacity, as you know, was diverted to the war effort, with America's manufacturers making war materiel related in some way to their peacetime products.
I don't know what the story might have been on ranges, which could have had some military applications, but which also might not have been considered suitable for the heavy use they'd get on ships, etc.
There was a very shady black market in goods intended for military use, but which had been diverted to well-heeled civilians who figured the rules didn't apply to them. If your range was produced for some military purpose, it's possible it re-entered the civilian supply by that means.
But between February of 1942 when the WPB was formed, and November of 1945, when the WPB was dissolved after the defeat of Japan, there was essentially no lawful production or sale of consumer durables for civilians in the U.S.
