Portable honeywell wont turn on

the thermostat is a variable rotation type. turning it in one direction varies a gap on a set of contacts mounted on the inside of the front panel. take the heater apart by taking out the four screws in back. the front panel should come off and you'll see the thermostat contacts. rotate the knob and see what the contacts do. if they make up, your element might be shot.

I have a somewhat old portable space heater.It was here when I nmoved in.Anyway last nite I turned it on and it worked perfectly!!!!.Today I turn it on and it worked for about 2 hrs.then it just quit.Model#HZ-341BW......Part#30LB0341UAO.. Please help!!!!! steviedxdd@yahoo.com.