Uploaded September 2020 | Updated September 2026, 2 weeks ago
Replacing the gas valve in a Trane TUX080C942D2 92% AFUE furnace and firing it up in heat mode for the first time in who knows when.
I am aware that many pipe dope compounds will activate electronic gas leak detectors. I believe that the detector's alerting was legitimate, as it did not go off when placed near the pipe dope, only the union.
I'm also aware that the "warning style" CO alarms can take hours to sound in the face of small amounts of CO emission. I never did find the handheld tester I have (also from Klein Tools), and even if I had, I'm not sure how much I trust it. On any furnace (including brand new ones) where I've placed it in the heating airflow leaving the supply ducts, it's almost always reported small amounts of CO (1-3 PPM IIRC).
Replacing the gas valve in a Trane TUX080C942D2 92% AFUE furnace and firing it up in heat mode for the first time in who knows when.
I am aware that many pipe dope compounds will activate electronic gas leak detectors. I believe that the detector's alerting was legitimate, as it did not go off when placed near the pipe dope, only the union.
I'm also aware that the "warning style" CO alarms can take hours to sound in the face of small amounts of CO emission. I never did find the handheld tester I have (also from Klein Tools), and even if I had, I'm not sure how much I trust it. On any furnace (including brand new ones) where I've placed it in the heating airflow leaving the supply ducts, it's almost always reported small amounts of CO (1-3 PPM IIRC).
