RecallChek


Results 1 to 21 of 21
  1. #1
    Drew McGee's Avatar
    Drew McGee is offline Member
    Join Date
    Dec 2007
    Location
    florida
    Posts
    9

    Default furnace will not shut off

    I ran into an electric furnace today that will not shut off. It is central forced air, and it would not shut off if the temperature was met, so I switched the system off, and it wouldnt stop blowing hot. Finally had to shut it down at the panel, but was wondering if anyone had an idea as to the cause.

    Thanks for any help,

    Drew McGee

    Similar Threads:
    Pillar To Post Home Inspection Franchise

  2. #2
    Join Date
    Mar 2007
    Location
    Ft. Myers, FL
    Posts
    363

    Default Re: furnace will not shut off

    Its been awhile, but possibly the sequenser (which sequenses the heat strips) or a contactor??

    Paul Kondzich
    Ft. Myers, FL.

  3. #3
    Join Date
    Mar 2007
    Location
    Spring Hill (Nashville), TN
    Posts
    5,616

    Default Re: furnace will not shut off

    Quote Originally Posted by Drew McGee View Post
    I ran into an electric furnace today that will not shut off. It is central forced air, and it would not shut off if the temperature was met, so I switched the system off, and it wouldnt stop blowing hot. Finally had to shut it down at the panel, but was wondering if anyone had an idea as to the cause.

    Thanks for any help,

    Drew McGee
    I would be betting on a bad thermostat.
    Was the system running before you broke it?
    I hope you told the homeowner that you shut down the system.....

    Scott Patterson, ACI
    Spring Hill, TN
    www.traceinspections.com

  4. #4
    Join Date
    Aug 2007
    Location
    Memphis TN.
    Posts
    4,252

    Default Re: furnace will not shut off

    Quote Originally Posted by Drew McGee View Post
    I ran into an electric furnace today that will not shut off. It is central forced air, and it would not shut off if the temperature was met, so I switched the system off, and it wouldnt stop blowing hot. Finally had to shut it down at the panel, but was wondering if anyone had an idea as to the cause.

    Thanks for any help,

    Drew McGee
    Drew,

    How long did the blower run after the temp was met / switched off ?

    It Might have Choked Artie But it ain't gone'a choke Stymie! Our Gang " The Pooch " (1932)
    Billy J. Stephens HI Service Memphis TN.

  5. #5
    Drew McGee's Avatar
    Drew McGee is offline Member
    Join Date
    Dec 2007
    Location
    florida
    Posts
    9

    Default Re: furnace will not shut off

    The system was on, but I lowered the temp. I prefer the term 'failed under test', but the seller is aware of the situation.

    The system ran for around 30 minutes, but it was more than the blower, the strips were hot the entire time, even after it was off at the thermostat.


  6. #6
    Join Date
    Mar 2007
    Location
    Dallas, Texas
    Posts
    3,891

    Default Re: furnace will not shut off

    Sequencer failure, very common failure on electric furnaces.
    A thermostat failure is not likely if you used the system switch (Heat, Off, Cool) after turning the temperature back to normal.

    Jim Luttrall
    www.MrInspector.net
    Dallas, Texas

  7. #7
    Drew McGee's Avatar
    Drew McGee is offline Member
    Join Date
    Dec 2007
    Location
    florida
    Posts
    9

    Default Re: furnace will not shut off

    Thanks for all your answers


  8. #8
    Join Date
    Mar 2007
    Location
    Santa Rosa, CA
    Posts
    2,081

    Default Re: furnace will not shut off

    Quote Originally Posted by Scott Patterson View Post
    I would be betting on a bad thermostat.
    Was the system running before you broke it?
    Scott, you crack me up.

    CREIA CCI & Evil Genius
    http://www.FullCircleInspect.com/

  9. #9
    Jim Zborowski's Avatar
    Jim Zborowski Guest

    Default Re: furnace will not shut off

    Is the fan switch set to "run" or "AUTO'?


  10. #10
    Jerry Peck's Avatar
    Jerry Peck is online now Member
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
    Posts
    23,348

    Default Re: furnace will not shut off

    Quote Originally Posted by Jim Zborowski View Post
    Is the fan switch set to "run" or "AUTO'?
    Jim,

    That was my thought too, and (I suspect) that of Billy when Billy asked "How long did the blower run after the temp was met / switched off ?".

    Drew said "The system ran for around 30 minutes, but it was more than the blower, the strips were hot the entire time, even after it was off at the thermostat."

    That would not be the fan set to 'On' instead of 'Auto'.

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

  11. #11
    Jerry Peck's Avatar
    Jerry Peck is online now Member
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
    Posts
    23,348

    Default Re: furnace will not shut off

    Quote Originally Posted by Drew McGee View Post
    I ran into an electric furnace today
    Like Scott said, you broke it man.

    You really need to stop running into things like that.

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

  12. #12
    Join Date
    Aug 2007
    Location
    Memphis TN.
    Posts
    4,252

    Default Re: furnace will not shut off

    Quote Originally Posted by Jerry Peck View Post
    Jim,

    That was my thought too, and (I suspect) that of Billy when Billy asked "How long did the blower run after the temp was met / switched off ?".

    Drew said "The system ran for around 30 minutes, but it was more than the blower, the strips were hot the entire time, even after it was off at the thermostat."
    .

    I was thinking cool down period, my money is on the Limit Switch.

    It Might have Choked Artie But it ain't gone'a choke Stymie! Our Gang " The Pooch " (1932)
    Billy J. Stephens HI Service Memphis TN.

  13. #13
    Join Date
    Mar 2007
    Location
    Dallas, Texas
    Posts
    3,891

    Default Re: furnace will not shut off

    The limit switch is a safety that never comes into play unless the furnace is on a runaway. The blower and heat strips continuing to run could be stopped by the limit switch if there was too much heat, but that would only occur if the normal operating control is broken.
    Sequencer switch is the culprit.

    Jim Luttrall
    www.MrInspector.net
    Dallas, Texas

  14. #14
    Jim Zborowski's Avatar
    Jim Zborowski Guest

    Default Re: furnace will not shut off

    OK, I missed that. Thought he said the blower wouldn't stop.


  15. #15
    Join Date
    Aug 2007
    Location
    Memphis TN.
    Posts
    4,252

    Default Re: furnace will not shut off

    Quote Originally Posted by Jim Luttrall View Post
    The limit switch is a safety that never comes into play unless the furnace is on a runaway.
    .
    Sequencer switch is the culprit.
    Either way time for The Trades.

    It Might have Choked Artie But it ain't gone'a choke Stymie! Our Gang " The Pooch " (1932)
    Billy J. Stephens HI Service Memphis TN.

  16. #16
    Join Date
    Mar 2007
    Location
    Dallas, Texas
    Posts
    3,891

    Default Re: furnace will not shut off

    Either way time for The Trades.
    Agreed.

    Jim Luttrall
    www.MrInspector.net
    Dallas, Texas

  17. #17
    Drew McGee's Avatar
    Drew McGee is offline Member
    Join Date
    Dec 2007
    Location
    florida
    Posts
    9

    Default Re: furnace will not shut off

    Thanks again. By The Trades, are you saying its time to call in a service tch?


  18. #18
    Join Date
    Mar 2007
    Location
    Dallas, Texas
    Posts
    3,891

    Default Re: furnace will not shut off

    Yes, "Trades" would mean someone specifically trained in one of the specialties such as A/C, Electric, Plumbing.

    Jim Luttrall
    www.MrInspector.net
    Dallas, Texas

  19. #19
    Drew McGee's Avatar
    Drew McGee is offline Member
    Join Date
    Dec 2007
    Location
    florida
    Posts
    9

    Default Re: furnace will not shut off

    Thanks. That was my initial call,I was just trying to get a handle on the cause.


  20. #20
    TOM DEEHAN's Avatar
    TOM DEEHAN Guest

    Default Re: furnace will not shut off

    Quote Originally Posted by Billy Stephens View Post
    I was thinking cool down period, my money is on the Limit Switch.
    If the limit had tripped (over heat condition) and the heat strips were still running, that sounds like a melt down. Better call the HVAC guy.


  21. #21
    TOM DEEHAN's Avatar
    TOM DEEHAN Guest

    Default Re: furnace will not shut off

    [quote=Drew McGee;31082]I ran into an electric furnace today that will not shut off. ]

    Did you have the right thermostat?


Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •