Roof Vent Issue: Stuck on Off and Low Speed

edwinklee
edwinklee Member Posts: 2
in Teardrop Groups & Links
Hello: My 2022 T@B 320 roof vent (Dometic Fan-Tastic Vent Fan) three-speed knob is sometimes stuck on Off and 1-Low speed. Sometimes after fiddling it can go to 2-Medium and 3-High. Wonder if anyone knows if there is something wrong with the knob or it is "sensor-controlled" somehow? I cannot figure it out by reading the manual. Any help is appreciated.

Comments

  • Grumpy_G
    Grumpy_G Member Posts: 755
    Sounds like a mechanical failure inside the switch. These switches are dead simple, see this link for pictures: https://www.etrailer.com/Accessories-and-Parts/Fantastic-Vent/FVK1031-05.html 
  • edwinklee
    edwinklee Member Posts: 2
    Thank you for very useful info.
  • WayneW
    WayneW Member Posts: 256
    Before I replace that switch I would consider the PWM fan mod. It’s cheap ($10?) and results in a variable speed fan that is quieter and uses less energy. I think the 3 factory speeds are High, Too High and Hurricane. 

    It’s a pretty easy and cheap mod that I think makes the fan much more useful. It’s also considerably easier and cheaper than replacing the fan w a different model, but that being said, some have switched out fans and love their new one. 
    2021 320S BD
    2017 F-150
    Coeur d'Alene, Idaho
  • BrianZ
    BrianZ Member Posts: 1,770
    +1 for the PWM fan mod.
    Here's photos of how I did mine..
    https://tab-rv.vanillacommunity.com/discussion/comment/140981/#Comment_140981
    Still working great, and so nicely quiet!
    -Brian in Chester, Virginia
    TV: 2005 Toyota Sienna LE (3.3L V6)
    RV: 2018 T@B 320S, >100 mods 

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