White residue in heat exchanger

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Robert_H
Robert_H Posts: 377
in Oil Heating
1000006361.jpg

What causes the white residue that is down deep in the heat exchanger? This was on a boiler I serviced yesterday the residue does clean out no problem.

Comments

  • EBEBRATT-Ed
    EBEBRATT-Ed Posts: 21,329

    Its normal

    ethicalpaulRobert_H
  • EdTheHeaterMan
    EdTheHeaterMan Posts: 12,952

    Indicates that you have proper combustion. The "white frosting on the cake" is a byproduct of combustion that lets you know that you are not making soot but are very close to the proper air fuel mixture. If there were any less combustion air you may start to get incomplete combustion and make soot. But you are not there yet. So clean the fan on the oil burner so it delivers the the same amount of combustion air next season. Clean any dust off of the air inlet also. Someone has that adjusted just right. Don't mess it up!

    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?

    Robert_H
  • Robert_H
    Robert_H Posts: 377
    https://forum.heatinghelp.com/discussion/comment/1882506#Comment_1882506

    That's good information Ed, thank you!

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