You need a new fan blade. What is happening is the Blade is not secure on the shaft of the fan, so it spins freely. the fan motor is turning normal, but because of the slippage of the blade, you get that squeek noise. The other thing that is happening is because the blade is slipping it is not moving very much air to keep the magnetron cool, so it is tripping the thermal overload on the magnetron, it is a self resetting tco that is why the power will come back on after it has cooled down, and kill the power when it has over heated. Should'nt cost you more than about $10 for the fan blade...Keep us posted.........
Last edited by abadfish66 : 05-29-2008 at 12:54 AM.