My PXD01ANI Box not connecting

I've received two boxes from my local Xfinity store and neither have worked. The small box I have is a piece PXD01ANI. I get an RDK 10000 message on my screen. The error code letters may be incorrect.  It's constantly asking me to reset the box. The box is really warm after being plugged in for about five minutes. I tried it on other televisions in my home where the boxes are working and still no connection. Are these really old boxes? FCCID has manuals from 2015.