@Robert-E 

Thank you for your feedback regarding the temperature control behavior of your KE100. We understand your observations about the valve operation and temperature fluctuations, and we appreciate the opportunity to clarify how the system is designed to work.

The temperature regulation of the KE100 is driven by a sophisticated algorithm, not a simple on-off mechanism. The valve adjusts its opening based on multiple real-time factors, such as the difference between your target and the current room temperature, as well as the duration of operation. The full-open or full-close behavior you observe is the result of various factors interacting at certain times, and it does not mean that the valve is always operating in an all-or-nothing manner.

Regarding temperature fluctuations: the KE100 regulates temperature by adjusting the valve, which inevitably introduces a degree of thermal lag. When the valve opens, hot water flows through, causing the temperature to rise. Even after the valve closes, residual heat in the system continues to drive the temperature upward for a period of time. Our algorithm has been designed to minimize the impact of the delay. Additionally, to ensure long-term battery life and device reliability, the frequency of valve adjustment needs be limited. While more frequent adjustments could narrow the temperature band slightly, they would also significantly increase power consumption. Therefore, we balance precision with efficiency to support stable performance over time. I hope this explanation helps you understand the reasons behind the temperature fluctuations.