Read again the part that talks about 15 minutes of jiggling...
Only 15 minutes? Oh, you'll have to do better than that! I put in a bunch of time on the 250C when it did it to me, and then one mysterious day it just operated again. In fact, I was so 'programmed' on the wiggle try that the first time it went to 1 I overshot and turned it back off again before I could react to success. But I slowed down a bit and got it to go again on another session. -- Jim
