I just learned a couple valuable lessons with my M & B I thought I'd share while I have some time to kill. After a couple years of all grain batches, I thought I'd try a "quick and dirty" extract batch to see how it goes. Steeped with a couple gallons for 20 mins, topped it off to 6.5 gallons and brought to boil. Slowly added 3 pounds of DME, went well, no boil over, so far so good.
Last 15 I was going to add a can of LME and knew to do it slowly. I actually turned off the burner and stirred in the goop. Stirred some more, then fired it back up and got the E4. Great. Unplugged and pushed the reset switch, E4 again. Did this 4 or 5 times before draining the wort into a couple buckets and saw that there was some pretty good scorching even though I thought I took my time. Cleaned that off, dumped in a bit of wort, E4 again! This time though, when I tried to reset, I felt a "click". Argh! Put in a gallon or so of wort and it's heating back up again... so the rest goes back in the kettle and I'm here waiting for a boil.
I'll let it go for a few minutes before resuming my schedule. I had it on 1000w, BTW
Lessons learned:
1. If using LME, drain out some wort into something and dissolve the LME into that before adding back to the kettle.
2. If you don't feel the click, your E4 isn't reset. lol