The C302 is one of the oldest documented model numbers in Thermador’s built-in electric convection oven family, listed by the brand’s own installation manual alongside the C271, C272, C301, and the later SEC- and CM-prefixed ovens as sharing the same installation approach. It represents an earlier naming generation than the self-clean-branded SEC series that followed it.
On an oven this old, service calls are almost entirely mechanical and electrical: worn heating elements, a tired convection fan motor, door seal degradation, and – given the age – it’s worth inspecting the wiring at the junction box for corrosion before assuming a control failure.
Key Features
- 30-inch built-in electric convection oven
- Documented by Thermador alongside the self-clean SEC-series ovens as part of the same 'Built-in Electric Convection Oven' installation family
- Older C-prefix naming generation, predating the SEC self-clean naming convention
- Shares cabinet-prep and electrical installation steps with the SEC271/SEC301/SEC302
Most Common Issues on This Model
Element failure after decades of service
Convection fan motor wear
Door seal/hinge wear affecting bake consistency
Aging electromechanical timer or control failure
Wiring corrosion at the hardwired junction box