Range · outside the gas main
A propane Frigidaire range on a well-water property north of town lit its burners with a lazy yellow flame and left soot on the pans. A look at the orifices showed a botched conversion at installation; it had run rich for years. We swapped the orifices to propane spec, adjusted the air shutter, and the flames went blue. The oven igniter, which was on its way out, was replaced in the same visit.