Information Needed for Refrigerator Decision

Thanks for all the information. The model number is NDR1402. I did the dollar bill test and compared the resistance when I pull the bill out with my new refrigerator in the house and they seem comparable, so my assumption is the door seal is OK. It sounds like I have a thermistor problem or a circuit board problem. It seems the defrost cycle is not running at all if I have all that frost build up.

The drain lines seem to be working fine and look OK.

I will test the thermistor with the ice of glass water and see what happens.