Thank you for using Just Answer. My name is Justin. I will work hard to help you solve your problem, start to finish. As we move forward with your problem, please remember to provide positive feedback after you accept my answer. You will still receive additional assistance at NO EXTRA CHARGE should you require it. Now, let's get started shall we... When you say you turned unit on and it started cooling, then stopped, did you notice if the freezer compressor was still running? And, it cooled to 5 degrees in the freezer at that point? From what you're saying, it sounds like possibly the compressor is not running after awhile. This could signify a failing control board relay. The fact that the unit is capable of cooling to 5 degrees leads me to believe you probably don't have a refrigeration leak. What you'll need to do is remove the compressor relay cover on the freezer compressor. If/when it does fail again, we'll need to check the compressor to see if it is running by placing your hand on top of it. If it is not and/ or it is very hot, we need to verify 120 volts to the compressor then. Based on your description, you either have a failing control board, or the compressor relay/ overload is giving you issues. With no error codes, I'm suspecting a control board issue. The fact is, it almost has to fail in order to take voltage readings to see where the failure might be. My advice, let it plugged in, DO NOT cycle the power if it fails. I'd advise you to have your freezer clear of food at this point. When/if it fails, come back to this question right away so we can take some voltage readings.
Here's how it works Tom. I have two buttons I may push when I reply to you. One is a "Need Info" button and I reply with that while we are trying to determine your problem and help you through to a solution.
Once I'm satisfied I've helped you solve your issue, I respond by pressing the "Answer" button. It is then that you may give me a rating. HOWEVER, and I stress... If I do answer the question using the answer button, and you do rate me, it DOES NOT close the question. You may come back to this question at any time for more assistance. I haven't sent the response and clicked the answer button yet, because I'm trying to wait for another failure to occur with your refrigerator so we can work through some troubleshooting steps. Does this clear it up for you?
You shouldn't need to defrost the freezer, as this unit is self defrosting. If it does end up needing defrosted, that suggests a problem in the defrost circuit. Defrost should occur every 8 - 12 hours. If it does not, the freezer evaporator will clog with frost and you'll get high temps. So watch for that.
As far as the grille just being propped on, that shouldn't cause an issue. What would though is if the condenser coil was all clogged up with hair/dust/lint. Then you'd get overheating compressor possibly. If you need more help in a week or two, just come back to this question. DO NOT open a new one. The return is free.