Hot Stuff is a short animated cartoon I remember seeing on Curiosity Shop, a children’s educational program from the early seventies.
The dialogue is exactly what I remember (“No! Not the fork!”). The animation seems different, but I may be conflating it with something else. For a long time I searched for this without success thinking it was Fire! by Michael Glyn, made in 1969.
I was only able to get this by asking a librarian. If you go the the cleaners and say, “I lost my ticket, but it’s a blue sport coat” they can’t do much for you, and may well show a bit of annoyance. (Surprisingly, they don’t sort them by color). If you go to a librarian and say, “I’m looking for that one video with the fire demons and the toaster,” they’ll keep at it until they track it down.
Hot Stuff, by Zlatko Grgic, is a nine-minute educational cartoon from Canada, designed to promote fire safety. It’s pretty funny. The site, by the National Film Board of Canada (Office National du Film du Canada) has other good stuff too, for different age groups.