Variable Speed (PWM) Ceiling Fan Mod == 10 Bucks



  • FreespiritFreespirit Member Posts: 108
    BrianZ,  thank you for taking the time to post your pictures of the PWM Controller install. My wife and I followed your picture instructions to the “T” and everything went back in place perfectly and worked as expected the first time. No issues at all!!  We can now leave our portable fan home and use that space for something else. 
    2020 TAB 320 U
    TV 2020 4Runner
  • BrianZBrianZ Member Posts: 1,611
    You're welcome, @Freespirit.  Glad to hear it worked for you the first time - that's great!
    @MuttonChops found a great application for the PWM controller.  It has really helped us sleep without excessive fan noise & also conserve battery power when camping without hookups.

    -Brian in Chester, Virginia
    TV: 2005 Toyota Sienna LE (3.3L V6)
    RV: 2018 [email protected] 320S, >90 mods 
  • SlackersSlackers Member Posts: 236
    edited April 2021
    Jumping in late, but I just completed this mod.  It was as simple as swapping out the 3-speed switch for the variable speed rheostat provided by @Lloyd above.  The existing connectors aren't an exact match with the new part but I made them work.  Ultimately I'll have to replace the connectors or apply a couple dabs of solder for connections that will hold up in the long run.
    2019 Tab 320 CSS, 2019 Ranger TV, OH
  • JeffroNCJeffroNC Member Posts: 349
    I added one to the bathroom fan in our 400. On low speed you can barely hear the fan. I can run it in the rain as well. I prop the door open with a pool noodle. 
    I was all set to swap out our fan but I’m happy as is. 
    2019 [email protected] 400 BDL 2017 F150 3.5L Ecoboost
    Jeff & Amy
    Now in Manistee, MI

  • Maxcamp8Maxcamp8 Member Posts: 79
    Thanks to all the prior wizards for their trials and posts on making the speed controller retrofit a success.
    Who else has had the fan cover plastic tabs fail?

    While adding a fan hood to our 2021 TAB 320, I found a piece of black plastic atop the fan screen.  Turns out the lifting mechanism attaches to the fan cover via two extruded plastic 'clip angles' which cracked where the sheetmetal screws go into them.  Have not read about this happening to others, we travelled on very bumpy highways with the lid socked down.  
    Upgrading to variable speed control and disassembly elicited the second clip angle was also broken.

    Pic 1. Cut the clip angle remnants off with a dremel wheel and fabricated an aluminum angle to mount he lifting mechanism to.  SS #12 x 1/2 sheetmetal screws through fan lid, did not want to remove the added hood to through-bolt which would be better.  Buttered the holes with silicone caulk before assembly.

    2. removed four-position original fan switch, used 1/8 drillbit to slot edge for metal tab on potentiometer (speed control knob) so it does not swivel after mounting.  Mounted potentiometer here.  Peeled and scraped off 0123 label and created a tapered arrow label in its stead.

    3. After experimenting with speed controller (printed circuit board) locations, determined the only feasible spot is angled atop the potentiometer (below photo 2 above) as others have done.  Made plywood support for it to anchor to.  Epoxied plywood to plastic fan cowling.  Covered potentiometer with stickyback epdm pipe insulation to prevent circuit board shorting.

    4. Used angle grinder to remove corner of outer heat sink, to clear fan cowling. Careful not to overheat board from the grinding heat.  Test fit into cowling and test fit cowling into fan opening.

    5. Hot melt glued controller board in place.

    6. Wired it up with 14ga stranded, see PDF.  You need both fullsize and half-width female spade connectors, insulated or heat-shrunk.  Cut down several zip-tie adhesive-backed mounts to corral wires.

    7. Final install.

    8. PDF wiring diagram.

    2021 T&B 320S Boondock/ Tacoma 4 cylinder truck
Sign In or Register to comment.