If I have a power cut will my Glycol Chiller (GC4) resume at my set temperature? Yes, when the power comes back on the Glycol Chiller will resume at the temperature you set it at. Related articles Why is my GC4 flashing and beeping? How to empty glycol from the GC4 Glycol Chiller Why is the Glycol Chiller set to -4°C (24.8°F) / -4.5°C (23.9°F) How often do I replace the propylene glycol in my GC4? Instructions - How to switch your Original G30 controller from Fahrenheit to Celsius