Our chest freezer suddenly died as well. With the same components I turned a mini fridge into a freezer until we get a new one. The thermostat wouldn't go low enough. So I replaced it with a digital temperature sensor and microcontroller. Clock is used to delay restart for 200 seconds after power failure or compressor OFF. Refrigeration compressors need to be off for some time before restarting so they don't try to start under running pressure. Added a 12V pc fan inside and a USB fan blowing on the compressor.