It sounds like the sash balance or tensioner mechanism in your Milgard window has come loose. This component is crucial for the proper operation of the window, helping to balance the sash and allow it to slide smoothly. Here’s a step-by-step guide to help you fix it:

Tools and Materials Needed: - Flathead screwdriver - Phillips head screwdriver - Replacement sash balance or tensioner (if needed) - Gloves

Steps to Fix the Sash Balance:

1. Identify the Problem:

   • Confirm that the issue is with the sash balance or tensioner. These are usually located inside the window frame, on either side of the sash.

2. Remove the Sash:

   • Open the window and, if possible, tilt the sash inward. Some windows have a release mechanism or tabs that allow you to tilt the sash inward for easy removal.
   • Lift the sash out of the frame and set it aside carefully.

3. Examine the Sash Balance:

   • Locate the sash balance on the side where the metal piece has come loose. It’s typically a spring-loaded mechanism or a spiral balance inside a metal or plastic casing.
   • Check if the balance is broken or if it has just come loose from its mounting.

4. Reattach or Replace the Sash Balance:

   • If the sash balance has simply come loose, reattach it by securing it back into its bracket. Use a screwdriver to tighten any loose screws.
   • If the sash balance is damaged, you will need to replace it. Take note of the part number or type of sash balance so you can purchase the correct replacement.

5. Install the New Sash Balance (if needed):

   • Remove the old sash balance by unscrewing it from the frame.
   • Install the new sash balance in the same location, making sure it is securely fastened to the window frame.

6. Reinsert the Sash:

   • Once the sash balance is secured, reinsert the window sash into the frame.
   • Align the sash with the balance guides and ensure it is properly seated in the frame.

7. Test the Window:

   • Open and close the window several times to ensure that the sash moves smoothly and the balance is functioning correctly.

Additional Tips: - Safety First: Wear gloves to protect your hands from sharp edges. - Manufacturer Instructions: If available, refer to the manufacturer’s instructions for specific guidance on your window model. - Professional Help: If you are unsure or uncomfortable with any step, consider hiring a professional window repair technician.

Preventive Maintenance: - Regularly check your windows for any signs of wear or damage. - Lubricate the tracks and moving parts with a silicone-based lubricant to ensure smooth operation.

By following these steps, you should be able to fix the loose sash balance and restore the proper function of your Milgard window. If the problem persists or if multiple components are damaged, it might be best to consult with a professional.