Anyone comparing it with the Masterpiece MEM301WS will find the same layout in the POM301W: a convection oven (4.5 cu ft, 13 modes) above, and a 4.7 cu ft cavity below that offers microwave cooking only. Their combined draw is 10,200 watts, with a 15A circuit listed by Thermador, and the lower cavity offers no bake, roast or convection modes.
This division is the key to every diagnosis. A lower cavity that fails to heat food is a microwave-system matter, so we look at the magnetron, turntable motor and high-voltage diode. An upper cavity that fails to heat implicates the convection elements, the fan motor or the control board.
Air Fry, the Single-Point probe and Self Clean all live upstairs, and the probe port, lock and Home Connect pairing are checked there.
No. Like the Masterpiece MEM301WS, its lower cavity is microwave only in Thermador's spec sheet, with no other modes, so baking and roasting belong to the upper oven.
Thermador still lists it; we confirm each part's availability before we quote a repair.
A microwave-circuit part: magnetron, high-voltage diode or turntable motor. The upper oven uses separate elements and a fan, so it can keep working perfectly well at the same time.
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