Oven does not start when TIMER knob is turned
Door is not completely closed
Food is not cooked at all
Timer not set correctly, door not closed, or electrical circuit overloaded
Food is overcooked or undercooked
Inappropriate cooking time or power level set
Sparking and cracking inside the oven (arcing)
Use of dish with metal trimmings or metal utensils inside
Microwave causes interference with radios or televisions
Proximity to televisions, radios, or aerials
Condensation inside the oven
Normal air flow and steam escaping from vents
Microwave oven operating without any load
Safety feature to cut off power
Clicking sound during operation
Normal sound when electrical power output changes
Hot air or steam released upon door opening
Heating process within the oven
Accumulation of food particles or grease
Build-up on oven surfaces