Don't Be Afraid of the Dark (1973)
Sally Farnham (Kim Darby) and her husband Alex Farnham (Jim Hutton) move to an old mansion that belonged to Sally's grandmother and they hire an interior designer and the carpenter Mr. Harris (William Demarest) to redecorate the manor.
Sally opens a locked door in the house and finds a sealed fireplace and ash pit. She asks Mr. Harris to open the fireplace but the old man argues with her and refuses to follow the order. Sally uses Mr. Harris' wrench to remove the bolts of the ash pit cover. Sooner Sally finds that evil little creatures that fear the light have escaped from the underground through the ash pit and are threatening her. However, Alex and her friend Joan Kahn (Barbara Anderson) believe that Sally's imagination is affected by the words of Mr. Harris. (IMDB Claudio Carvalho)