How do I find my All-Weather 120V heat pump's serial number? December 10, 2024 17:33 Updated You can find the All-Weather 120V heat pump's serial number in the Gradient app and in the settings on the heat pump's UI. Related articles The cord isn't long enough. What should I do? What are the main app screens and what do they do? How many people are required to install the All-Weather 120V heat pump?