Propane is the point of the PRL304EG. Thermador built this older Pro Grand range, 30 inches wide, to burn LP gas, and its service manual ties it to LP siblings in 30, 36, and 48-inch sizes. Because the design is LP-specific and not convertible, every burner or ignition problem is judged against how a propane system behaves, not a natural-gas pattern, with the supply and regulator always on the checklist.
The service manual runs 118 pages, which suggests Thermador documented it for field servicing and not as a basic owner’s guide. Igniters, valves, and thermostats on such a range were designed to be repaired, so the whole unit rarely needs to go.
When a burner will not light and you smell gas, propane included, close the range’s gas valve first. Propane gets the same urgency as natural gas.
It was built for LP, and Thermador's documentation treats it as an LP-specific model, so we troubleshoot it as a propane range. We would still verify the gas type on the range before any repair.
Weak flame on every burner points toward the LP regulator or supply line before any single igniter or orifice, so those are our first stops.
Yes. Close the gas valve, ventilate, and call us before lighting anything. Never relight anything until the room is clear and we have checked it.
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