How identified: Sense and Kill-A-Watt
Additional Comments: This I added because it applies and will be similar for most refrigerators. My specific brand of device is Frigidaire but also applies to Electrolux. If you have a heat that runs only once to twice a day for 10-5 minutes and uses 400-500 watts, this is the likely culprit. I had to use a kill-a-watt during a few cycles to confirm what it was.
Waveform Source. IPhone app Device Power Meter