What 1970's horror movie featured little men who live in a lady's furnace who chant -We want you! We want you!

Question

This movie is very disturbing. A lady has little troll men living in her furnace who chant "We want you! We want you! We are waiting for you!" and eventually they carry her into the furnace. I don't remember the title. I saw it when I was a kid and have been haunted by large furnaces ever since.

Answer 1

Don't Be Afraid of the Dark (1973)

Answer 2

A rare classic! "Don't Be Afraid Of The Dark". Cool points to you for being aware of it. Her husband dismissed her fears because she was an alcoholic and was taking pills. He returns home minutes too late to save her.