Overview
Whistling means air is being forced through a small gap at high velocity. Almost always the seal has lost compression on one side - often the top corner opposite the top hinge.
Symptoms
- Whistling in windy weather.
- Louder as wind increases.
Common causes
- Compression lost on one side.
- Seal gap or tear.
- Cylinder not flush.
When to call a professional
- Compression adjustment.
Prevention
- Compression check annually.