Wednesday, 10 March 2021

Gas smell from furnace exhaust pipe

Hello, I had the gas company over to check a pronounced gas smell in the garage. They could not locate the source within the garage or the adjacent HVAC room. But on the outside they did identify a significant reading coming out of the furnace exhaust pipe even if the furnace was off. (Believe the reading corresponded to 1/10 of a percent).

I've shut off the gas supply to the furnace and will be leaving the HVAC off till professional help arrives. But in the meantime I wanted to ask whether a faulty gas control valve is the likely culprit under similar situations? Perhaps there are other possibilities to rule out first?

Thanks for any insights!


source https://hvac-talk.com/vbb/threads/2227322-Gas-smell-from-furnace-exhaust-pipe?goto=newpost

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