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  1. #1
    Join Date
    Dec 2005
    Location
    Cleveland, OH
    Posts
    3,490
    Post Likes

    Why Is My A/C Whistling?

    Zoned 90+ furnace, been chugging away for 10 years. Cust just had A/C clean and check a few weeks ago. Now it's making loud whistling noise when the A/C runs. I go there and find the blower wheel just impacted with dirt. We pulled apart and cleaned her EAC (which they seem to be neglecting) but no one looked at the blower. After cleaning the wheel (no pic of wheel, sorry) I decide to look up at the secondary heat exchanger:



    About a half hour later it looked like this:



    It stopped whistling too! I can understand not looking at the secondary HX on an A/C check, but the blower should've been pulled with a wheel that nasty.
    Good? Bad? I'm the guy with the gun.

    Statements made by me are strictly my opinions and do not reflect the opinions of my employer. I am not authorized to make any official statements on behalf of my employer.
    Any technical advice offered by me is for educational purposes only, all HVAC related repairs should only be attempted by qualified personnel.

  2. #2
    Join Date
    Oct 2003
    Location
    South Carolina
    Posts
    1,242
    Post Likes
    WOW!

    And here I thought it was whistling because it didn't know the words.
    “Two things are infinite: the universe and human stupidity; and I’m not sure about the universe.” —Albert Einstein

  3. #3
    Join Date
    Feb 2010
    Location
    Northeast, PA
    Posts
    235
    Post Likes

    Thumbs down Tell them!

    About the air filter thingys that might catch some of that there debris!

    They were running at peek efficiency? wowwowowowowowowowowowowwowowowowowowowowowowowowo wowowowowowowowowowowowowowowowowowowowowowowowowo wowowowo!

  4. #4
    Join Date
    Sep 2002
    Posts
    4,858
    Post Likes
    It could be the mad whistler

  5. #5
    Join Date
    Nov 2005
    Location
    Louisiana
    Posts
    200
    Post Likes
    Good for you man, most other companys would have cleaned the wheel and called it a day.

  6. #6
    Join Date
    Jul 2007
    Location
    Beautiful, Philadelphia, the City of Brotherly Love!
    Posts
    1,166
    Post Likes
    You might want to check out the cooling coil on your next visit.

  7. #7
    Join Date
    Jul 2008
    Posts
    11
    Post Likes
    i just whistled looking at that...

  8. #8
    Join Date
    May 2004
    Location
    southern california
    Posts
    60
    Post Likes
    back when I used to do warranty work ( what a nightmare that was ....... ) was sent out to this section 8 house. complaint low air flow the filter in the furnace was plugged, below the furnace platform was an EAC,, yup cells dirty, and pre screen plugged, then as i was looking round i noted that there was a return filter grille, so i opened it, was yet another plugged filter...... and these people breed ????? not enuff clorine in the gene pool

  9. #9
    Join Date
    Oct 2009
    Location
    new jersey
    Posts
    271
    Post Likes
    We need to add a new code in the flat rate book. Inspect secondary heat exchanger. 1 hr 199$

  10. #10
    Join Date
    Aug 2010
    Location
    Little town in Texas
    Posts
    734
    Post Likes
    There are not a lot of 95+ furnaces in this area i guess. And i pulled out an ancient lennox pulse with the 2-speed condenser about a month and a half ago. That's the day i found out about the secondary heat exchanger...and it was very dirty..plus nobody had ever split the condenser coil to clean..evaporator coil was 75 %covered....poor system was doomed

  11. #11
    Join Date
    Mar 2009
    Location
    Triad - North Carolina
    Posts
    512
    Post Likes
    It's whistling because it can't scream"I'M DIRTY, CLEAN ME"!!!!!
    Yes, I've seen that before and it doesn't mean I like it.

  12. #12
    Join Date
    Jan 2008
    Posts
    2,392
    Post Likes
    Yet another example of why EAC's should be thrown in the trash, and replaced with a media filter!
    "Hey Lama, hey, how about a little something, you know, for the effort." And he says, "there won't be any money, but when you die, on your deathbed, you will receive total consciousness." So I got that goin' for me, which is nice. - Carl Spackler

  13. #13
    Join Date
    Sep 2009
    Posts
    2
    Post Likes
    previous tech should of known something wrong when c/c was done by pressures

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