Upon recently moving into my new 10 year old home in Central Florida, I discovered that the lower sash of one (aluminum?/vinyl?) window would not remain in place when opened. Fortunately my cat was not on this sill when the sash collapsed making me aware of this situation.

Upon examining the window closely, it appeared that the lining of one of the cylinders in the side jamb had cracked. (Photo of cylinder in place and cylinder with grooved metal interior are attached, for reference.)

Can anyone please advise me of this part's name and whether replacements are available? Can the existing window be repaired or do I need an entire new unit?

Thank you in advance for any assistance you can provide!

 

The lining is fairly unimportant. But yes, replacements are available. I'm sure there is a Youtube video on it. Look for "spiral window balance".

 

The spiral balances are under spring tension and you would need to also order the winding tool in order to DIY. The size of spiral balance you will need to order is determined by the length of the tube and the weight rating of the spring. The color of the cap is the key to getting the counterbalance weight right. Red/blue/ white, etc. And you replace them in pairs so that you have a matching set.

Guess I could have included that info in the last post but I'm sure it's all included in someone's youtube video.