Think of the PRG305WH as the 5-burner sibling in Thermador’s all-gas Pro Harmony 30-inch series. It gains a center burner on the cooktop yet keeps the single 4.4 cu ft oven and standard 24-inch cabinet depth of the PRG304WH. The extra burner also changes the grates: two continuous pieces span all five burners, so a wobbly or misaligned grate is where we begin.
Without a dual-fuel electric oven or Home Connect WiFi, there is no app to lean on. We go burner by burner, then compare oven bake and broil results with the dial setting.
When a burner will not light and you smell gas, close the gas valve at the range before touching the igniter or burner. Nothing else on the safety list outranks that step here.
It adds a fifth, center burner, and its cooktop totals 80,000 BTU against 87,000 on the 4-burner. Its grates are two continuous pieces rather than one per burner.
The center burner sits between two others, so debris or a misaligned burner cap can disturb its flame. Check that the cap and igniter are seated and clean before suspecting the valve.
No. Both share one 4.4 cu ft cavity with the same four modes, so we run identical oven checks. Both checks take only minutes and are part of how we start a burner diagnosis.
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