When the furnace is off, the only way propane can emit from the burner is if the gas valve is faulty.
Obtain an LP detector from a store(or if you have a extra), hold it around everything connected to LP, it is a hundred times more sensitive than the human nose to hydrocarbon gas. When it sounds, spray the area with your soapy solution/kids bubble-maker solution.
Occasionally, when the storage tank is nearly empty the settled odorant in the tank bottom is released in a stronger mixture than normal, and leave a strong smell after everything is turned off. Since the odorant is added at the distribution plant, it is possible for more than the required amount to be added to a tanker.
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2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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