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Water pooling under your Thermador microwave or dripping from the door or vents typically indicates a leak. Common root causes include a worn or damaged door seal, a clogged or cracked waveguide cover, or excessive condensation buildup. For Thermador convection steam models, a cracked water reservoir or faulty internal water lines can also be the source of the leak.
You will likely need a Phillips head screwdriver, a putty knife for prying, and possibly a multimeter for electrical checks. Replacement parts might include a new door seal (gasket) ranging from $20-$50, or a waveguide cover costing $15-$30. If the issue is a cracked water reservoir in a steam model, that part could cost $70-$150, plus a small tube of food-grade silicone sealant for minor repairs.
Always unplug the Thermador microwave from the wall outlet before beginning any inspection or repair to prevent electrical shock. Be aware that high-voltage capacitors inside microwaves can retain a dangerous charge even after unplugging, so avoid touching internal components unless you are trained to discharge them safely. Wear insulated gloves and safety glasses to protect against potential electrical hazards and sharp edges during the repair process.
If the leak originates from inside the microwave cavity and is accompanied by arcing or burning smells, it often indicates a damaged magnetron or waveguide, which requires professional service due to high-voltage components. Persistent leaks after replacing the door seal or waveguide cover, especially if the unit is a convection steam model and the internal steam generator or water lines are compromised, suggest a complex repair best handled by a certified Thermador technician. Any situation involving a suspected cracked internal casing or a leak that appears to be coming from the high-voltage transformer area should immediately prompt a service call, as these are critical and dangerous failures.
Water leaking from the door often indicates a worn, damaged, or improperly seated door seal (gasket). Inspect the seal for cracks, tears, or debris that might prevent a tight closure.
Yes, a clogged or damaged waveguide cover can sometimes lead to condensation buildup inside the cavity, which may then drip out and appear as a leak. Ensure the cover is clean and intact.
No, it is not safe to use a leaking microwave as water and electricity are a dangerous combination. Unplug the appliance immediately and do not use it until the leak is identified and repaired.
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