Extruder temp sensor

I received my printer today successfully installed and got to the point where I was ready to test print. My extruder said it was up to temp but it was cold to the touch. I bumped up the temp setting and it came on then shut off at the 210 degree setting I put in. Still cold to the touch when I unplug the temp sensor it goes down to zero when I plug it back in it goes to 290c repetier locks everything out on an error message I was on my Windows 8 pc and decided to try my Windows 7 pc and got the same result. The extruder did get hot enough to extrude at the beginning when I fed the filament into the extruder. If you need anymore info I will add it tomorrow as it's bed time now and I have work in the morning.
Thanks,
Jake Fleury