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What is this pink and orange stuff in fouled oil boiler?

Steamback Member Posts: 37
edited April 2018 in Oil Heating
I'll admit it, I opened up my first old oil boiler today. What really intrigues me is the pink and orange mess at the bottom of the boiler chamber. What is that?


  • PhilDavid
    PhilDavid Member Posts: 68
    Red dye in oil and poor combustion
    HVACNUT Member Posts: 5,025
    That's just nasty.
    What model and age is the Buderus? I've never seen that HX design.
  • newagedawn
    newagedawn Member Posts: 586
    thats just alot of neglect and in desperate need of a tune up, that thing will run so much better , so sad to see a great piece of equipment so neglected
    "The bitter taste of a poor install lasts far longer than the JOY of the lowest price"
  • GBart
    GBart Member Posts: 746
    yeah, that's been running terrible
  • SuperTech
    SuperTech Member Posts: 1,919
    That's definitely the product of incomplete combustion. And yes, it is the dye in the oil that turns it that color. Proper cleaning and combustion testing will get that boiler chooching again.