The PRD304GHC is an older 30-inch Thermador Pro Harmony® range, documented in a substantial 143-page User and Care Manual published by Thermador – a level of documentation that reflects how extensive this range’s feature set and family were. Thermador’s own manual cross-references a wide family of 24-inch-depth Pro Harmony siblings spanning dual-fuel and all-gas configurations across 30, 36, and 48-inch sizes, including PRD366GHU, PRD486GDHU, and PRD364GDHU – confirming this was a full product generation, not an isolated model.
As the direct predecessor to today’s PRD304WHU and the broader current WHU/WDHU lineup, this range shares the same basic dual-fuel concept but runs on an older control and ignition platform with no Home Connect diagnostics. If a burner won’t light and there’s any smell of gas, shutting off the gas supply to the range comes first, before any other troubleshooting step, just as it would on the current-generation equivalent.
Key Features
- Older 30'' Pro Harmony® range documented in a substantial 143-page User and Care Manual published by Thermador
- Part of a wide-ranging 24-inch-depth Pro Harmony family covering dual-fuel and all-gas configurations across 30/36/48'' sizes, including PRD366GHU, PRD486GDHU, PRD364GDHU, and related models
- Predecessor generation to today's current PRD304WHU and related WHU/WDHU models
- Predates Home Connect WiFi
Most Common Issues on This Model
Burner not igniting or holding flame
Oven not reaching or holding bake temperature (electric side, if dual-fuel configuration)
Oven igniter not lighting the main burner (if all-gas configuration)
Door gasket or hinge wear affecting oven heat retention
Aging control knobs, indicator lights, or clock display