I'm going to first apologize for not knowing correct terminology, but we have an older Kenmore fridge, probably 20 years old now that has started having issues. The unit will keep both the fridge and freezer cold, but seems as of lately when I wake up in the morning the temp isn't as cold as it should be, and if I adjust the temperature knob from all the way cold, to all the way warm, and back to where we typically have it, the compressor and fan seem to start up just fine and the internal temp gets back to where I would expect it. I've always noticed where at times the lights dim a little bit, almost flicker, when the compressor it trying to start. Sometimes it will start, other times it will just die. Anyhow, I was hoping to get some advise from someone with a little expertise, and ideally if it's a simple fix, a link to said parts that are required for repair.

Thanks