This is a Traulsen freezer. What should the defrost termination switch be.

I currently have a F70-30F which is what the vendor sent me for the units Model and serial. But the switch has 120V to it and the defrost element ohms out good at 13. this is a new switch, second one from two company's and I got the same switch. Problem is elements don't draw amps and defrost the coil with the switch in place. But direct it does. Any suggestions pls.