The PRG364GDH is an older 36-inch all-gas Pro Harmony® range – Thermador’s own installation manual for this model explicitly covers both 30” and 36” units from the same generation, and cross-references closely related siblings including PRG304GH, PRL304GH, PRL364GDH, and PRG366GH. It’s the direct predecessor to today’s PRG364WDH and PRG366WH, sharing the all-gas cooktop-plus-oven concept but on an earlier control and ignition platform.
Because this generation predates Home Connect and any app-based diagnostics, troubleshooting relies entirely on physical observation: which burner won’t light, whether the oven igniter glows but fails to open the gas valve, and whether bake/broil temperatures track the dial setting. If a burner or the oven won’t reliably light and there’s any smell of gas, shutting off the gas supply to the range comes first, before any other troubleshooting step – a rule that doesn’t change regardless of how old the range is.
Key Features
- Older 36'' all-gas Pro Harmony® range, documented in Thermador's own installation manual covering both 30'' and 36'' models in this generation
- Part of a family that included closely related siblings such as PRG304GH, PRL304GH, PRL364GDH, and PRG366GH
- Predecessor generation to today's current PRG364WDH and PRG366WH
- Predates Home Connect WiFi
Most Common Issues on This Model
Burner not igniting or holding flame
Oven igniter not lighting the main gas burner
Bake or broil temperature drifting from the dial
Aging door gasket reducing oven efficiency
Worn control knob detents or clock/display fading