warning Black & Decker

Error Code E0

Indicates a fault with the room temperature sensor.

? What Causes This

Room temperature sensor malfunction or obstruction preventing accurate readings.

How to Fix It

Contact BLACK+DECKER customer service for support and assessment.

Source: page 26 of the official manual

From the manual

Manual page 26 — Black & Decker error E0

This error code appears in:

Black & Decker Bxac40007gb Portable Premium Air Conditioner