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Well, I'll try... It is probably 1950's, when the house was built. It is bright blue!

Here's the only thing I found online (from a few years ago):...

Hello,

I just moved into a house and it has an old blue Western Thin-Boy furnace. It was on and worked when I moved in, but I had to turn off the gas to install a dryer. Now the pilot is out. I...