La llave de la habitación no funciona.

When to use

Use this phrase when your physical key or electronic key card fails to open your hotel room door.

How it works

This sentence negates the verb 'funcionar' (to work/function) to describe a broken item.

• La llave: The key (feminine singular subject)
• de la habitación: of the room (prepositional phrase modifying the key)
• no funciona: doesn't work (negative particle + verb 'funcionar')

Register

This is a direct, neutral statement perfect for reporting a maintenance issue to staff.

Notes

Common front-desk issue. Neutral everyday wording.