I have a Cooker/crabtree switch but the cooker switch doesn't work? I currently have a gas cooker and it is currently on the "crabtree" switch but I'm looking into getting an electric cooker but I need to resolve this cooker switch problem first. I've replaced the switch with a new one but the problem remains the same, I turn on the "cooker switch" and the light on the switch indicates that it is on but it isn't transferring any power to my gas cooker. I'm not sure what else to do?