Do I need to replace the ignition module on my barbecue? We hear this question a lot. The igniter on a gas grill is an assembly consisting of several parts that can fail and can be replaced. Usually if your barbeque is not igniting the problem is the electrodes. The Electrodes are the miniature spark spugs inside the grill. The electrodes spark right next to the burners where the gas emits and ignites. The electrodes often get grease splatters, drops of sauce, marinades and dirt that gets in the way of a clean spark. Inside the grill it is easy to see the electrodes get dirty and no longer spark well.
Sometimes it is possible the module fails and the module has to be replaced. What we do to test the module is remove the module from the grill and disconnect all the wires. Put in a new 9 volt battery. Reattach the momentary switch and press the button. If the module and the switch are working the naked electrode spades will arc back and forth amongst themselves. If there is no spark disconnect the switch. Lay a screw driver or some other metal, non-coated tool across the spades that connect the switch in order to complete the circuit. See the video below.
If the naked electrode spades arc back and forth without the button then we know the button is the problem. If the module still will not arc with or without the button the module is bad. As a final test we can also hold the module to the side of the grill or some other raw steel surface to see if the module will arc against the metal. This is a simple part to replace and not terribly expensive. These tests will tell us if the electrodes, the wires, the connections, the switch or the module is responsible for the ignition failure.