How To Fix a Window that Won't Stay Open
How To Replace a Sash Cord
Double hung windows are windows having an upper and lower sash that slide up and down within the sash channel. Single hung windows have a similar appearance except that only the bottom sash moves. The window sashes can become difficult to operate for a variety of reasons, but repairs are often fairly straightforward.
First, lets identify the parts of the window. The window sashes run in the sash channels on the side jambs. The inner channel is between the interior stop and the parting strip, and the outer channel is bounded by the parting strip and the outer stop.