Harrah007: No idea what is causing the problem. Several years ago our oven broke & we had a very difficult time getting Sears to honor its warranty. My wife documented each contact and service attempt, as well as the problems and wrote a letter to BBB, the CEO & then the state regulator for consumer affairs. It was the response to the last that got action. Hopefully yours will come more swiftly than that. Bon Joon Koo is the CEO of LG Electronics, Inc. http://www.lg.com/global/investor-relations/company-info/overview Of course, if you don't feel like starting a "federal case" & no free advice is forthcoming, maybe you could just pay for the service.

Quite normal. Remember that one of the trip elements in a breaker is electromagnetic. It moves a piece of metal inside to trip the breaker... You've got 60Hz AC passing through an electromagnet with a semi-movable piece of metal in its field... If you've got enough current going through there, there's going to be some vibration! Oddly enough, however, my project GE panel (very nice, I must add. LOVE the neutral/ground bar layout) makes no such noises.

Klem1, window units are disposable. It's not likely for this person to be able to fix it... They are really not designed to be taken apart and worked on. The interior of them typically consists of formed styrofoam along with a slew of parts made of plastic. The cost to fix 'what is likely to be' a crying compressor --- $$$. What? That's ridiculous. I can buy a new one for cheaper than that. Congratulations China / Mexico / S Korea / Japan.

Since a few of you brought up cast iron - I know this is sort of a well-covered question, but I am still somewhat confused. My unit says specifically 'do not use cast iron' - but I have tried some cast iron and it works (Staub enameled kettle worked once, then didn't, though). Is the 'no cast iron' deal really mainly about scratching/cracking the glass? And the fact that it doesn't make full contact with the magnetic elements? I bought some silicone mats with cast iron in mind, but also am trying to make sure this is kosher since they are heat resistant up to 480 degress, but I really don't know how hot the bottom of a pan gets. Anyhow, thanks for the feedback about various pan types.