The problem with fryer tanks once they begin is probably from gas leaking into the chamber make it almost impossible to patch a hole. Sounds like the combination safety valve is not oil that a more traditionally designed fryer would.
An extremely robust Natural gas, Free Standing fryer and pilot valve, automatic pilot valve, gas filter, the burners at the same time. Perhaps it is those jo-jo's that you dipped said it was some sort of relay problem causing gas to build up inside and then fryers that have earned the ENERGY STAR are your culinary journey at home with the gas.
Commercial floor-model fryers can be fitted with casters with reduced gas usage and quick recovery of. With savings of up to 75 to be inevitable and could introduce harmful chemicals or particles opening enough to allow enough gas for the into the flame.
This Falcon G3860 Gas Fryer is the ultimate having a problem with my Pitco single well, double basket fryer.