Thank you for purchasing Haier gas water heater. The function of the 50℃ health lock is that when the health lock is opened, the highest temperature can only be set to 50℃, so as to avoid scalding by high-temperature water caused by misoperation. If you want to set the water temperature above 50℃, just turn off the health lock and raise the set temperature. Its function is as mentioned above, not to lock the temperature drop, thank you!
You are welcome to ask questions to the enterprise again.
I wish you a happy working life ~