Originally Posted by JackRAbbit
I ended up taking the FW to the dealership and they were able to solve my problem. In the end there was a small crack in the fitting that joins the furnace to the gas line. It took two technicians a couple of hours to find it and make the repair.
I am not convinced that is what you actually smelled but am very glad that they found that leak! Hair line cracks in a cast fitting can be very hard to find. The leak can be so slow that the soap runs away from the crack before any bubbles can form. Sometimes you may have to check it 8 or 10 times before you get to see it.
I use to do HVAC work before I had to retire. I developed a leak in my house AC and I could not find it. Had a friend come and look for it with no luck. Had a third friend come and look for it but still no! We used soap and electronic checkers as well as the old fashioned propane testers. Every month or so we had to add gas because of that darn leak! Finally I changed out the line and A coil. That was three years ago and haven't had a problem sense. Sometimes the leak is so small it just can't be found. Almost 30 years of HVAC work, almost 70 combined years of service and no luck. That was the only leak I could never find and of course it had to be mine! LOL!!
Again, glad they found that one. Hopefully that is the end of your problem but if the odor returns you know it isn't in the pipes.