Green water on start up

I’m getting green water on startup. Yesterday something was causing water to exit the burner but only when the burner was on. The issue went away when the burner was off so I kept cleaning.

Today on start up there was a dark green hue to the water. Usually its yellow or brown (and yes i run the water to cold after turning the burner iff).

Any idea what it is?

A few seconds after i saw it

Copper oxidation from the coils?

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Coils are steal. That mist from the burner? Apparently it’s diesel. It was leaking from
Behind the nozzle. They tried to tell me it was just condensation from the burner coil evaporating from the heat. Also that alkota has a cold water jacket around the coils as insulation. Good thing I pressed them on their BS or id have aerosolized diesel swirling around a hot engine.


You could have also smelled it off your finger

The water is also not green, it’s the color of the tubing inside the hose. It’s coming apart from the heat