I replaced the defrost timer and thermostat in my refrigerator, but the frost still builds up in the freezer and causes the refrigerator to not be cold. I think I may have put the black wire of the defrost timer on the wrong terminal and it doesn't work properly. I've tried it on three different terminals and it hasn't solved the problem. Can you help me?

Hi, thanks for your reply. The replacement part that I ordered from appliancepartspros has the black wire and I thought I followed the instructions and put it on the right terminal but I still have defrost problems. (I threw away the original timer and the instructions that came with the new one. That's why I need help.) This morning I defrosted the freezer and put the wire of the defrost timer on the only terminal I hadn't tried. If the timer is still good, maybe this will do the trick.

Thanks again for your reply. The instructions were exactly what I needed. I had the wire connected properly to begin with and I need to change it back. If it doesn't defrost properly this time, I guess I'll have to get a new timer. Will keep you posted.

I had tried the procedure you described and the defrost heater did come on. Guess the timer is bad. Will order a new one and see if that fixes the problem.
Thanks again for you help.