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Severe Rust

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charliechicago
charliechicago Member Posts: 172
edited November 28 in Gas Heating

Hello to all

This is a york condensing furnace with air for combustion taken from within the house.

What could cause so much rust?

I know chemicals in the house can, but most houses I go to are near the washer/drier and I don't see this.

They said they have a lot of humidity in the summer and have two portable de-humidifiers running.

Would I see anything out of the ordinary in my combustion analysis?

Hard to see from the last picture but there's light rust by the rollouts and on the burner box, burners, etc

Thank you.

hh1.PNG hh2.jpg hh4.jpg hh3.jpg

Comments

  • pecmsg
    pecmsg Member Posts: 6,673

    get the burner supply air from outside the laundry room

  • charliechicago
    charliechicago Member Posts: 172

    Furnace is not in the laundry room itself. It’s around the corner.

  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 19,172

    Taking the air from outside can't hurt. I think a lot of that is from the humidity. However when the furnace runs in the winter the humidity should be low..

    Laundry chemicals "around the corner" still counts if the combustion air comes from indoors.

    How old is the furnace?

  • charliechicago
    charliechicago Member Posts: 172

    I understand that the combustion air will be pulled from the entire basement. It's a finished basement and it would be difficult to install. Obviously, if that's the solution then it has to be done, I just wanted to rule out any and all other possibilities.

    The furnace is 13 years old

    Thanks in advance

  • Ironman
    Ironman Member Posts: 7,807
    edited November 29

    Laundry chemicals + humid air could definitely be causing that.

    What’s the manifold pressure on the burner and the temperature rise through the furnace after 5 minutes run time?

    Natural or LP gas?

    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • HomerJSmith
    HomerJSmith Member Posts: 2,672
    edited November 29

    The combustion process produces acidic water. More so in humid conditions and cold appliances. Check your flue and make sure that it is functioning properly. All boiler and furnaces condense before the unit reaches operating temperature. If the flue doesn't provide sufficient draft, there might be an excess of combustion moisture which will lead to excessive corrosion.

  • pecmsg
    pecmsg Member Posts: 6,673

    that’s a 90+ furnace.
    no flue

  • HomerJSmith
    HomerJSmith Member Posts: 2,672
    edited 2:51AM

    No flue??? Hmmmm. I'm so,so dumb not realizing that. Maybe a vent?

  • mattmia2
    mattmia2 Member Posts: 15,067

    is condensate backing up somewhere?

  • charliechicago
    charliechicago Member Posts: 172

    There was a no heat call because the the flame was not crossing over because the burners were so corroded, then the gas valve stopped working. I an going to replace it Monday and I will get back here with the info.

    Thanks for the responses.

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