Let me make a couple of things clear...
1. My furnace is repaired and it cost me $6 plus tax and about a minute and a half of my time. I spent two days researching my problem and corresponding with professionals. In fact, I spoke with a servcie person this morning who was supposed to come out but who AGREED with me and simply told me to let him know if the new swtich didn't remedy the problem. If I didn't feel comfortable with it I wouldn't have touched it.
2. The part that I replaced had nothing to do with any gas component of the furnace. Had it been - again - I would not have touched it.
3. It doesn't even compare to "If I tap on this circuit breaker it works". Try something more along the lines of - put in new light bulb before hanging a whole new fixture. No one here has ever installed their own garbage disposal either right?
4. I agree Redsy - we do spend a lot of time referring DIYers to professionals. I am behind that 100%. But I wouldn't call an electrician to put a new battery in my smoke detector and I don't have a problem with recommending the simplest solution first. Unlike the H&C guy that tried to scare me into having someone come out and tear my furnace apart "just to be sure" - well if I change out the rollout switch and my furnace works again - then I'm sure - I'm sure that no one needed to spend hours upon hours of unnecessary work in my basement.
So, all in all - I appreciate the concern, although it seems a little more like soapbox preaching rather than genuine concern, and believe me, I appreciate your opinions - that's why I come here. But I didn't just get off from my job at TCBY and decide I was going to fix my furnace. I might not be an HVAC contractor but I'm not completely ignorant to rest of the mechanical world outside of electric.
Bottom Line - If I didn't feel comfortable with the repair I would NOT have done it. I would expect you all to know the difference...