Because motion isn’t the same as output. When the magnetron or high-voltage components weaken, the microwave looks busy while accomplishing very little. The noise is there; the heat is not.
Usually, yes. It can come from damaged waveguide covers, worn components, or contamination. While it may appear briefly and disappear, it rarely fixes itself and often worsens.
That behavior often points to worn door switches or latch alignment issues. The unit is protecting itself. What feels like sensitivity is actually a safety system doing its job.
They can. In kitchens with heavy appliance use—especially alongside electric and gas cooktops—shared electrical loads and ventilation conditions sometimes expose weaknesses in microwave components.
When there’s sparking, burning smells, sudden shutdowns, or safety concerns. Emergency microwave repair isn’t about speed alone. It’s about restoring safe, predictable operation before risk increases.