Understand the choices.
A sticking panel, failed glass unit and worn frame are different problems. Start with the opening that needs attention, then compare a targeted repair with replacement based on its condition.
Photographs are illustrative. Confirm company credentials, availability and the complete charge when you call.
Useful references
ENERGY STAR window, door and skylight information ↗NFRC performance labels ↗General guidance. Confirm the scope for your property.