How to add commands on twitch streamlabs as a modThe No. 1 cause of pilot lights that won't stay lit is a worn-out thermocouple. It's easy to replace and a new one costs $5 to $10. Rather than trying to unfasten the thermocouple inside the water heater's burning chamber, it's easier to remove the whole burner and thermocouple assembly.How to write a case brief iracReplacing Thermopiles/Pilot Generators. I used to replace pilot generators that were "weak," generating 320 millivolts or less under the load of a gas valve magnet. Now it's rare that I do so. With better methods, I usually find that the reason for the weak millivolts is a pilot burner that is still dirty despite having been cleaned, poor pilot ...