/diy/ - Do It Yourself

First rule of HVAC: Hire a pro.

Ok, now that we've got that out of the way, I replaced the valve on my 50 year old LPG (Propane) furnace in my house trailer, made a manometer to set the inlet and outlet pressure, but no matter how far I diverged from the specified values, the flame was mostly yellow. So I set them to the correct values and just worried.

And then I noticed that the moment I opened the porthole door, the flame seemed to be a bit more blue for a moment, so I covered it with plexiglas and the flame was nearly completely blue. It's a simple furnace that draws air down a passageway around the exhaust pipe without any sort of forced air, so how would opening the door to look in cause the oxygen level to drop so much? If anything, I would expect it to be the other way around.

>inb4 I'll die in a fire tonight.