A range that will not light or a hood that has stopped drawing smoke is not something a household kitchen can simply work around for a week. Same-day dispatch is built for that: book online or by phone, and in most cases a technician is at the door before the day ends with the parts that fail most often on a La Cornue — igniters, thermocouples, door seals, drip trays — already in the van.
Before anything is opened you are told three things: when we will arrive, what we think is wrong and why, and what it will cost to put right. On a range this specialized, a clear diagnosis before work starts matters more than speed for its own sake.
