The M301 is a 30-inch single built-in electric wall oven from an older Thermador generation, documented in the brand’s own installation manual as dual-rated for either a 208V or 240V, 4-wire single-phase supply. That same manual specifies the exact dedicated circuit this model needs: 25 amps on a 208V supply, or 30 amps on a 240V supply – a detail worth checking first on any ‘oven won’t heat’ or ‘breaker keeps tripping’ call, since an undersized or mismatched circuit on an old install is a common, easily overlooked cause.
Being an older, pre-Home Connect unit, there’s no Wi-Fi module or app-pairing to consider – failures here are almost always mechanical or electrical: heating elements, the door seal, or the wiring at the oven’s junction box, which on a decades-old hardwired appliance is worth inspecting for corrosion before replacing more expensive parts.
Key Features
- 30-inch single built-in electric wall oven
- Dual-rated for 208V or 240V AC, 4-wire single-phase supply
- Documented circuit requirement: 25A at 208V / 30A at 240V
- Predecessor to Thermador's later ME301/ME301WS/ME301YP single-oven lines
Most Common Issues on This Model
Tripping breaker traced to an undersized circuit for this model's specific amperage rating rather than a problem in the oven itself
Aging mechanical or early-electronic clock/timer assembly failing
Bake or broil element burnout after decades of service
Door hinge and gasket wear allowing heat loss and inconsistent baking
Wiring/terminal block corrosion at the 4-wire junction, common on older hardwired ovens