The MEMCW271 is the 27-inch version of Thermador’s legacy Masterpiece combination oven, sized for a narrower cutout than the 30-inch MEMCW301 but sharing the same documented electrical requirements: dual-rated 208V/240V AC on a 4-wire single-phase supply, with a 50A circuit per Thermador’s installation manual.
As with the brand’s other legacy combination units, treat the convection and microwave sections as separate systems for diagnostic purposes – they fail independently even though the oven shares one cabinet, one door, and one electrical circuit.
Key Features
- 27-inch Masterpiece combination built-in oven with microwave
- Dual-rated for 208V or 240V AC, 4-wire single-phase supply
- Documented circuit requirement: 50A
- Narrower 27-inch counterpart to the 30-inch MEMCW301 of the same generation
Most Common Issues on This Model
Microwave section failure independent of the convection cavity
Breaker undersized for the documented 50A requirement
Convection cavity element or fan failure
Door seal/hinge wear, more noticeable given the narrower cabinet footprint
Wiring corrosion at the junction box