Feed a new length of sash cord over the pulley on each side jamb and down into the wall cavity.
Sash window weights stuck.
Sash cord snapped if your sash cord snapped and the sash has twisted in the frame becoming stuck firmly then you are in luck this is the easiest fix.
Your sash windows have been freshly decorated and there is no longer room in the frame to travel lower down if you ve pulled the window forcefully it s now stuck firm.
How to replace window sash weights accessing the weights.
Replace the access doors to conceal the sash weights.
Pry the old sash cords from the sides of the window sash.
Pull one of the sash cords until the sash weight hits the pulley then lower the weight about 3 inches.
Prying off the window trim may or may not give you access to the weights but you won t know.
Remove the window and then open the panel cover on the side jambs to access the sash cord weight and pulley.
Access the window sash cords.
Tie the sash weights onto the new cords and drop them back inside the wall.