Set up the fridge with the Peltier controller inside the house with the doors open so ambient was at about 12C. I then shut the doors at 20 minutes on the graph and turned on the heater. The controller sensor is mounted on the Peltier coldplate inside the fridge. Then plotted the results.
I have not optimised the settings for integral and differential yet I just went with the default.
I think it works very well.
Bert
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