If the pilot flame will not stay lit on a gas water heater, what should be checked first?

When addressing the issue of a pilot flame not staying lit on a gas water heater, the priority should be to check the gas burner for cleanliness. A dirty or clogged burner can prevent the necessary gas flow or disrupt the proper combustion process, leading to an unstable pilot flame. Since the pilot light relies on a steady flow of gas to remain lit, any obstruction or contamination on the burner can directly affect the flame's consistency and stability.

By ensuring the gas burner is clean, you can foster a more reliable ignition and combustion process, which typically resolves issues related to the pilot flame. This aspect is critical in gas appliance maintenance, as proper cleaning can often restore functionality without needing more extensive repairs.