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Auxiliary fridge fans for Dometic 8CF fridge

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  • #61
    Originally posted by Cate&Rob View Post
    Hi Keith,

    This setup is definitely going ot move more air than the original single fan. We have not had fridge cooling problems with the single fan. We are usually camped with the fridge side to the west (chosen whenever possible to shade the camping side in the afternoon) and the fridge fan runs all afternoon. The single (probably inexpensive) OE fan is quite audible inside the trailer. I will be interested in the noise level with these upgraded fans. Will you still run the original fan as well?

    Rob
    Yes I plan to tie the new fans into the existing fan power supply (tap at the thermal switch) and run all three. However I can vary the speed of the new fans. New fans pull somewhere around 0.2A each. Existing fan is on a 3 amp fuse. I plan to change that out to a 5A fuse to cover the new fan loads. The existing 16 awg wire (looks like it) is easily good for that added load. I also will have a switch where I can kill the power to the new fans - don't know if I will need it, but it will be there.

    Thanks for your thoughts
    Keith
    2018 Reflection 150 Series 220RK 5th wheel, SteadyFast system, Star White 2022 F350 King Ranch CC Long bed (HAL), B&W 25K OEM Companion

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    • #62
      Heres a link to my fans: Fridge fix when not cooling (Norcold 1210) - Grand Design Owners Forums (gdrvowners.com)

      I replaced the 2 that were burned out with new ones. They are LOUD though. Sound like angry bumblebees when they turn on. I may change them out if it get's annoying.

      I also run one of these fans in the fridge. Valterra FridgeCool RV Refrigerator Fan with On/Off Switch - Battery Operated Valterra Accessories and Parts A10-2606 (etrailer.com) I've run it in every camper I've owned and it keeps the fridge 5-10 degrees cooler. I can maintain 25 degrees in 100 degree heat at level 6 on the fridge. Any colder and the beer freezes.
      2020 GD 320G
      2021 Ram 3500 H.O. SRW.

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      • #63
        Update Started on the wiring in between drizzle events - a bit cold for this time of year. I tested the stock fan flow with the new fans in place. I think I will leave things as is and get them wired up. I did find a place to run the fan cabling.It the very far left side of the bay. I ran a piece of bailing wire first and will pull the cables up, Just finished getting them wrapped in the loom. Pictures to come.
        2018 Reflection 150 Series 220RK 5th wheel, SteadyFast system, Star White 2022 F350 King Ranch CC Long bed (HAL), B&W 25K OEM Companion

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        • #64
          Yoda Keith, have you ever seen https://www.sonicelectronix.com/item...YaAmY4EALw_wcB ? Since they have a defined narrow output, might be a good option for blowing air up the fins.
          Joseph
          Tow
          Vehicle: 2018 GMC K2500 Denali Diesel
          Coach: 303RLS Delivered March 5, 2021
          South of Houston Texas

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          • #65
            Originally posted by Jlawles2 View Post
            Yoda Keith, have you ever seen https://www.sonicelectronix.com/item...YaAmY4EALw_wcB ? Since they have a defined narrow output, might be a good option for blowing air up the fins.
            No I have not. Too bad they don't give the full dimensions so you can check the available room. No IP rating either.
            Thanks
            Keith
            2018 Reflection 150 Series 220RK 5th wheel, SteadyFast system, Star White 2022 F350 King Ranch CC Long bed (HAL), B&W 25K OEM Companion

            Comment


            • #66
              Nice a sunny this morning, so I finished the wiring. Getting wire for the top to bottom was interesting. Found space along the left edge.

              Click image for larger version

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              Was able to run the two fan wires and the loom with the power wire along the left side of the cabinet. Theses were pushed further left to behind the wall and secured with 3-M sticky squares and zip ties.

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ID:	88383 The wires above were secured along the metal vent using the same 3m squares.

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ID:	88384 This shows how I am powering my fans. Note the double wire cumming off the thermal switch. When the stock fan is given power the aux fans gets power too.

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ID:	88385 Everything is wired up and I now have excellent air flow up top. I installed an on/off switch center. Red wire comes from the thermal switch up top. Small yellow wire powers the fan speed controller to the right. The red and blue cables that run from the left to the fan controller (little black box mounted to back of fridge) are the fan communication cables.

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              I sealed the space around the fans with Gorilla duct tape. Should last a while and allows access if needed.

              So that project is complete. Next up is replacing my rear observation camera.

              Keith
              2018 Reflection 150 Series 220RK 5th wheel, SteadyFast system, Star White 2022 F350 King Ranch CC Long bed (HAL), B&W 25K OEM Companion

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              • #67
                Specs here: https://stingerelectronics.com/produ...ow-cooling-fan roughly 8.5" x 2" x 2"
                Joseph
                Tow
                Vehicle: 2018 GMC K2500 Denali Diesel
                Coach: 303RLS Delivered March 5, 2021
                South of Houston Texas

                Comment


                • #68
                  Yoda

                  Keith,

                  While you are up on the ladder with the upper vent removed add insulation to the top of the fridge, I think it is helpful as there is not much there.

                  Brian
                  Brian & Michelle
                  2018 Reflection 29RS Oct.2017 build date, EMS-HW50C , Lippert Remote
                  2015 Chevy 3500HD CC LB Duramax , Reese Elite 18K

                  Comment


                  • #69
                    Originally posted by Country Campers View Post
                    Yoda

                    Keith,

                    While you are up on the ladder with the upper vent removed add insulation to the top of the fridge, I think it is helpful as there is not much there.

                    Brian
                    Good advice! The top of the slide box is only 1 1/2” of rigid foam insulation. A slide topper helps a lot by shading the slide top . . . but, packing the space above the fridge with rigid foam helps even more. (This is what I did).

                    Rob

                    Cate & Rob
                    (with Border Collies Molly & Angel)
                    2015 Reflection 303RLS
                    2022 F350 Diesel CC SB SRW Lariat
                    Bayham, Ontario, Canada

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                    • #70
                      Originally posted by Country Campers View Post
                      Yoda

                      Keith,

                      While you are up on the ladder with the upper vent removed add insulation to the top of the fridge, I think it is helpful as there is not much there.

                      Brian
                      I don't think I can - its blocked by a metal baffle that directs the air toward to the vent. Ill check next time I am up.
                      2018 Reflection 150 Series 220RK 5th wheel, SteadyFast system, Star White 2022 F350 King Ranch CC Long bed (HAL), B&W 25K OEM Companion

                      Comment


                      • #71
                        Originally posted by Yoda View Post

                        I don't think I can - its blocked by a metal baffle that directs the air toward to the vent. Ill check next time I am up.
                        That baffle will tilt up , it is screwed to the outer wall. It is actually a piece of side skirt trim. I tilted mine up and filled the gap with insulation. I do not think the baffle does much to get air out of the cabinet. There are big gaps around it and the hot air that your new fan setup is pushing up there will collect in this empty area and actually heat the top of your fridge.

                        Brian
                        Brian & Michelle
                        2018 Reflection 29RS Oct.2017 build date, EMS-HW50C , Lippert Remote
                        2015 Chevy 3500HD CC LB Duramax , Reese Elite 18K

                        Comment


                        • #72
                          Originally posted by Country Campers View Post

                          That baffle will tilt up , it is screwed to the outer wall. It is actually a piece of side skirt trim. I tilted mine up and filled the gap with insulation. I do not think the baffle does much to get air out of the cabinet. There are big gaps around it and the hot air that your new fan setup is pushing up there will collect in this empty area and actually heat the top of your fridge.

                          Brian
                          Thanks
                          I had not messed with it, so I will definitely check that out
                          Keith
                          2018 Reflection 150 Series 220RK 5th wheel, SteadyFast system, Star White 2022 F350 King Ranch CC Long bed (HAL), B&W 25K OEM Companion

                          Comment


                          • #73
                            Hi Keith,

                            Looking back through your pictures, it looks like there is some type of insulation on top of your fridge. I replaced my original Atwood fridge with a Dometic . . . so I had to create my own baffles. The upper one does not fit as well as it should, but you can see the stack of rigid foam pieces that I used to fill the space above the fridge. (I used what I had left over from insulating the walls of the fridge space).

                            Rob

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                            Cate & Rob
                            (with Border Collies Molly & Angel)
                            2015 Reflection 303RLS
                            2022 F350 Diesel CC SB SRW Lariat
                            Bayham, Ontario, Canada

                            Comment

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