the unit was coming off and on due to a bad gas valve. the unit is a intermittent piolit gas fired package unit. checked the gas pressure it was fine and the heat exchanger ,crossover tube ,gasvalve ,and flame rod is brand new. i made sure flue compartment was sealed with caulk inducer fan is running and i only smell the oder when flame is on. anyone have any ideas ?
I'm with the previous poster and the light coating of oil and new production coating(s) being burned off. -Unless there has been some really funky sheet metal customization done to this unit. Give it two more weeks and see how you feel about it.
Is there enough fresh air coming in to feed the combustion chamber? Do you have exhaust fans running? Open chimneys elsewhere that are pulling a draft? Is the chimney open and not blocked by anything? Backdraft is very dangerous and deadly.
If you are smelling combustion gases, you have a cracked heat exchanger...and a very sensitive nose. Combustion gases are odorless. I doubt you do, I think you are just imagining things or you've done something bizarre...like caulk your flame box. Why did you caulk your flame box? That was insane. I bet you are smelling that, not any mysterious combustion product. The only other thing that could be happening is that the new heat exchanger is always shipped with a thin coating of oil to keep it from corroding while in shipping or in storage at a warehouse. That coating could be (as it should be) burning off and you are smelling that.
might just be the normal odor that results when the oil coating on the heat exchanger burns off.. usually stops within a day or so....if you think the odor is products of combustion then have one or more carbon monoxide detecters installed in the home....then have the supply air tested for for carbon monoxide AND carbon dioxide.....carbon dioxide is the normal product of combustion,its the more likely gas to be present [ initially] when a furnace is faulty....depending on where you live,the local fire dept or local gas utility can assist...............dan
