Viwinco’s Tilt-n-Lock system is a patented innovation designed to simplify window operation while maintaining security and ease of use. Whether you need ventilation or easy cleaning access, the Tilt-n-Lock system makes it effortless.
Understanding the Tilt-n-Lock Positions
The Tilt-n-Lock system operates based on the position of the lock handle, controlling both the locking mechanism and the ability to tilt the sash inward.
0° (Horizontal) – Locked Position

At 0°, the sash is securely locked, and the tilt latches are engaged with the window jambs. This prevents unintended opening and enhances security.
150° – Unlocked, Sliding Mode

At 150°, the sash is unlocked but still held in place by the tilt latches. This allows for smooth vertical operation— the window can be slid up or down.
180° (Vertical) –
Tilt Mode

The tilt latches disengage, allowing the sash to tilt inward for easy cleaning.

Troubleshooting Tips
- If the sash does not tilt inward, double-check that the Tilt-n-Lock handle is fully in the 180° position before attempting to tilt.
- If the window does not lock properly, ensure the sash is completely seated in the frame and the handle is rotated fully back to 0°.
If you have any questions about operating your Viwinco windows, their customer service team is here to help. For troubleshooting, maintenance tips, or product support, contact their customer service at 800-927-2848.