Replacing flue pipe, and gas valve on a Rheem furnace; then checking flue gas with Testo 300

HVAC GUY
HVAC GUY
Oct 25, 2026

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I was called to this address because of no heat. Gas had been locked off. I wouldn’t turn on gas until flue pipe had been replaced. Then the gas valve was leaking. I also found elevated CO levels, 51 ppm - concerning, but not enough to condemn furnace - not yet.