Hello. Know the spare part you are talking about. When you had the cover off did you notice if it was all safe? You know the thingy that fits in to that? Next to the thingermyjig. Know what I mean? Get a GSR in. I know it seems simple and you think you know what that thingy does, but you could very well put yourself, your family and neighbours at risk by messing with bits n bobs you don't know the name of. Please leave it alone. When it comes to gas, carbon dioxide and carbon monoxide it is just not worth the risk!?[/QUOTE
Wow, such a lovely welcome to the forum. I would explain the back story, the advice I've already have from a GSR and why she told me to buy the part and fit it myself.
But then, why should I!
It just reaffirms that even with 'professional`trades people there's always a smart-arse. Thankfully you don't live near any of my properties so I'll never have to call on your services.