Internal Temp range for Series 3?

Discussion in 'TiVo Series3 HDTV DVRs' started by FloridaEd, Dec 10, 2006.

  1. FloridaEd

    FloridaEd New Member

    Dec 10, 2006


    I can't seem to find any official documentation or posts specifying the acceptable internal temperature range for my new series 3. My unit runs about 51 deg C inside my cabinet and about 49 deg C resting on a table outside the cabinet. These temps seem rather high, although the Tivo system info reports these temps as Normal. Ambient temp in the room is about 75 deg F - Tivo S3, I believe, is spec'd to 95 deg F external ambient.

    Does anyone know what the max internal temp of the series 3 is spec'd to?
  2. maharg18

    maharg18 Active Member

    Dec 3, 2002
    Chattanooga, TN
    I have no idea what the max temp is, but I can tell you that mine runs at about 48 degrees C in a 70 degree F room.
  3. lordrichter

    lordrichter Registered User

    Jan 10, 2003
    Chapel HIll, NC
    'Nuff said... :)
  4. FloridaEd

    FloridaEd New Member

    Dec 10, 2006

    Thanks for the quick reply.
    I was concerned that I was on the hairy edge of an internal temperature problem. I'm glad to see that someone else is reading these high internal temperatures. My concern is that if the unit is close to the Max temp when placed in the cabinet, I may need an auxiliary fan to improve the airflow. Also, running the unit near its max temp is usually not a good idea for commercial or military equipment since the MTBF may be significantly reduced, therefore reducing the life of the unit.
  5. Bierboy

    Bierboy Seasoned gas passer

    Jun 12, 2004
    Fishers, IN


    My S3 typically runs anywhere from 42C to 46C in 70F room.
  6. TexasAg

    TexasAg New Member

    Apr 2, 2006
    I think the max temp in spec is 55C. I've never seen mine go above 50C.
  7. hookbill

    hookbill Feathered Member

    Dec 14, 2001
    Northeast Ohio
    Yep, that's right where mine runs too.
  8. FlippedBit

    FlippedBit New Member

    Dec 25, 2001
    Mine is running at 42C in a 64F room.
  9. HerronScott

    HerronScott Well-Known Member

    Jan 1, 2002
    Staunton, VA
    64F? Brrrrrr... :)

    I just noticed that my Series 3 is running at 51C (123.8F) which is a lot higher than my Series 1 which is running at 37C (98.6F). We had an abnormally warm day here so it's 74F now (64F outside).

    I'm a bit concerned about the higher temperature and the effects on the disk drives longevity, but looks like the disk drive is rated for 41F-131F. The Series 3 does run substantially hotter than both of my Series 1 units in the same location.

  10. Bierboy

    Bierboy Seasoned gas passer

    Jun 12, 2004
    Fishers, IN
    Footnote to my previous post: my S3 was at 40C this morning which is the coolest I've ever seen it. But normal range is 42-46C in a room that ranges from 60-72 degrees.
  11. joelkfla

    joelkfla Member

    Feb 9, 2002
    Orlando area
    Mine is usually around 46-47C. I'm in Florida, so room temp is typically 73-75F during the day, when we're not having a cold front.

    It runs about 4 to 5C higher than my early S2.

    And I haven't installed it in a cabinet yet; it's just sitting on a table near the TV.
  12. suzook

    suzook Member

    Oct 22, 2006
    long island
    my s3 with an upgraded 500gb drive runs at 46c outside my cabinet, and as high as 58c inside a cabinet with no exhaust fan. i have installed an exhaust fan and it now runs at 50c. btw, when it was at 58c, it stated it was still at normal temps.
  13. aaronwt

    aaronwt UHD Addict

    Jan 31, 2002
    My three S3 units range from 42c to 46c in 72F rooms. The one that sits on top of an HR10-250 is the hottest at 46c.
  14. larrs

    larrs Movie Fan-Addict

    May 2, 2005
    I actually searched to find this thread for the same purpose. Mine is located in a cabinet and with the door shut it runs around 48c and up to 50c when watching on the big screen with the receiver on. I guess I'll not worry for now.
  15. windracer

    windracer joined the 10k club

    Jan 3, 2003
    St. Pete, FL
    Mine runs at 51C in the cabinet (doors closed) and at 47C when the doors are open.
  16. miller890

    miller890 Member

    Feb 15, 2002
    My S3 is at 46-49C in an open front cabinet with room temperature at 64-70F.

    I was thinking I could drop the internal temp a couple of degrees by piping the exaust air from the S3 fan out of the cabinet. I haven't figured out a what sort of duct or tube to use and how to secure it to the back of the fan grill. Any ideas?
  17. bareyb

    bareyb Under Maintenance TCF Club

    Dec 1, 2000
    Silicon Valley
    My S3 boxes run at about 46-48 degrees and are mounted insde a cabinet with an open back. Ambient room temp is 75 degrees. I have two of them one stacked on top of the other. The one on top runs at the same temp as the one on the bottom. That wasn't the case with my old DirecTiVo boxes. So the S3 seems to tolerate "stacking" better than my old ones did.

    The box itself feels quite cool compared to my old DirecTIVos. I think the geeks at TiVo came up with a better cooling system in these boxes. It's also much quieter than my old boxes. All I can hear now is the Comcast DVR chugging away... I can't hear the TIVo boxes at all.
  18. T-Shee

    T-Shee Member

    Sep 22, 2006

    I used a 3.25" diameter mailing tube, with enough length cut to fit precisely around the fan/exhaust port on the back of the S3 and the the back of the cabinet - in effect creating a dedicated "tunnel" for the warm exhaust air to exit.

    This reduced overall internal temperatures by an average of 2 deg C. Glad I did it, it's invisible, cost nothing but the effort to cut the hole in the cab. and the length of tubing.

    Piece of Cake. Go for it.

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