User Manual Q&AAnswer
Jan 28, 2025 - 08:37 PM
To set the desired temperature on the hygger HG-921 Smart PTC Heater, follow these steps:
1. Plug the heater into a power source and ensure it is placed in the aquarium according to the provided diagram.
2. Gently touch the "SET" button on the IC temperature controller. The digital temperature display on the heater will start flashing three times.
3. Press the "+" or "-" button on the temperature controller to increase or decrease the desired temperature value. The display will flash the desired temperature value three times and then return to displaying the current water temperature.
4. Your temperature setting is now done. You can press the "+" or "-" button persistently to cycle through the temperature range of 70-94°F.
Note: The hygger HG-921 Smart PTC Heater has a dual relay design for safety. It will automatically stop heating when the water temperature exceeds 97°F and start working again when the temperature drops below 93°F.
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