Do I have to use Bluetooth when connecting my Gradient unit? September 16, 2026 18:30 Updated Yes, Bluetooth is required for the Gradient app to connect to the All-Weather 120V heat pump. Related articles Where do I download the app? Do I need Wi-Fi to use the Gradient app? How do I create a schedule? What is the set temperature? Can I control my All-Weather 120V heat pump when I'm not home?