Home>Discussions>DOORS & WINDOWS>Sash locks broken on casement window
9 posts / 0 new
Last post
BBRochester
Sash locks broken on casement window
BBRochester

Awaning window (replacement by American Craftsman) is locked closed. The sash lock levers move but don't unlock the window! Any advice on how to get the window unlocked?

dj1
Re: Sash locks broken on casement window
dj1

Without seeing what you have:

You say that the lever (crank) moves but the window doesn't.

Take the crank off, there is a retaining screw hidden there, and check it. I would guess that the crank is worn out. If it is, get a replacement crank and try it again.

ed21
Re: Sash locks broken on casement window
ed21

Are the Windows painted shut? If so a utility knife should free them up.
The sash locks are usually simple cams, so chances are the opening mechanism is not working or is frozen up somehow. Can the window be pushed and moved at all after it's unlocked. One last thing is I've had the splines on a crank handle break so that it just spun on the shaft.

Mastercarpentry
Re: Sash locks broken on casement window
Mastercarpentry

Most of these are just a lever, link rod, and hook. It usually takes a lot of force tl break anything and then it's usually the handle which lets go. I'm betting the lock is OK but the sash is stuck. Approach it from that angle and see what happens.

Crank mechanisms usually fail because the sash movement became stiff and nobody fixed that so something wore out. If the handle just spins pull it and check the shaft. If that just spins too you need a new crank assembly. And when any window sash no longer moves freely, fix it- it's not going to get better by itself.

Phil

BBRochester
Re: Sash locks broken on casement window
BBRochester

Not painted shut. I can crank open about a 1/4 inch and that's it. The lock levers move freely (up/lock to down/unlock). This is different from the one working window I have, which has some resistance when moving the lock levers.

BBRochester
Re: Sash locks broken on casement window
BBRochester
dj1 wrote:

Without seeing what you have:

You say that the lever (crank) moves but the window doesn't.

Take the crank off, there is a retaining screw hidden there, and check it. I would guess that the crank is worn out. If it is, get a replacement crank and try it again.

Crank only works a few turns, window starts to move, but then the crank is impossible to budge-about 1/4 movement. By putting a putty knife between the window frame and weatherstripping I can see that the lock is not down (in the unlock position) even though the sash lock levers are in the down position.

BBRochester
Re: Sash locks broken on casement window
BBRochester
dj1 wrote:

Without seeing what you have:

You say that the lever (crank) moves but the window doesn't.

Take the crank off, there is a retaining screw hidden there, and check it. I would guess that the crank is worn out. If it is, get a replacement crank and try it again.

Mastercarpentry wrote:

Most of these are just a lever, link rod, and hook. It usually takes a lot of force tl break anything and then it's usually the handle which lets go. I'm betting the lock is OK but the sash is stuck. Approach it from that angle and see what happens.

Crank mechanisms usually fail because the sash movement became stiff and nobody fixed that so something wore out. If the handle just spins pull it and check the shaft. If that just spins too you need a new crank assembly. And when any window sash no longer moves freely, fix it- it's not going to get better by itself.

Phil

Not a crank issue. The crank turns a few times, window opens about a 1/4 then I can no longer crank.

dj1
Re: Sash locks broken on casement window
dj1

It could be a case of layers of paint preventing the window from opening.

If that's the case, get your chisels, utility knife and flat screwdrivers...and start cleaning.

Mastercarpentry
Re: Sash locks broken on casement window
Mastercarpentry

Since you can see the locks aren't releasing, have you tried moving them where they latch with a putty knife, wire, or whatever? Worst case scenario if you can get to them would be to cut or break the catches to get the window open so that you can replace them. And have you checked with the manufacturer or local dealer for assistance?

Whatever you do, do NOT try to force them open with the cranks or you'll damage them too.

Phil

Sponsored Stories

TV Listings

Find TV listings for This Old House and Ask This Old House in your area.