Costco Broan 80 cfm CST80SL bathroom fan wiring

[@barryhansen7677]

Thank You for doing this video. I had the hole cut and the old fan torn out when I realized this was not best retrofit fan for a single electrical lead. Your wiring explanation saved the day for me and I was able to get it installed. Who cares about the timer and humidity features. I will not be purchasing this same model to replace the other fans in my house. Broan and COSTCO owe you a royalty for saving frequent returns!

[@squidonthebeach]

I believe the instructions do make mention of the required smart switch... although this fan is horrible. Mine is a slightly newer model but has the eletrical wires coming out between the fan blades... the malformed plastic blades cut through most of the wires

[@Gmoon917]

For reals I was so lost

[@JenHarmon-f7g]

I agree 100% with Costco and Broan owe him a royalty for the frequent return. We almost returned 4 of them.

[@theBRT1955]

God bless you sir. This was exactly what I needed. What I did not need was a fan that's driven by the dew point in my bathroom; that I can figure out on my own. Again - thank you!

[@spdracerm05]

Hey all, I just replaced my old exhaust fan with this exhaust fan w/light. The instructions are a bit vague on some of the installation instructions, especially for the wiring. If you take a good look at the wiring diagrams you will note that this model is for a 2 switch (light & fan) or for a 3 switch (light, fan & humidity sensor). Also note on the wiring diagram that the gray wire is optional for the 2 switch. Which completes the circuit for the humidity sensor. I’m using the 2 switch. One switch controls the fan and humidity sensor and the other switch controls the light…and fan. Yes, I have the fan and the light on one switch. So the interesting thing is that if I have both switches on, once I just turn off the light switch the fan will continue to run until the humidity is reduced enough that the sensor shuts off the fan. This may get annoying but I think it will work for me for now. May change it out later where the light is controlled by one switch and the fan on the other switch but then you’ll loose the functionality of the humidity sensor. Ugh! This should have all be explained in the installation guide. My 2 cents, hope this helps.

[@JenHarmon-f7g]

This video was a life saver and extremely helpful! Well demonstrated and very clear to understand.

[@hectorgalvan8177]

I bought two of these and was in the same predicament as others. I will be returning the one still in the box. Nothing on the outside of the box to let you know you're going to need more parts. Thank you for this video!

[@aaruff3]

Thank you for the informative video. Is it possible to run the fan/sensor/ timer together and forget about the light function? My main concern is the humidity sensor and fan being able to run when needed.

[@DrRamey]

Just what I needed to know! I do plan on hooking it up to a 3 switch, but this gets me working until I can get that bought and installed. Thanks!!!

[@kamilsonmez4455]

Thank you so much for this video. Like others said, this was exactly what I needed. Very precise and easy to understand.

[@brunomerelo640]

Thanks, I was about to return it, appreciated your help

[@samuellopito]

I was just about to give up!!! Your video saved my day, Thank You!!

[@trinacria1956]

I was wanting to know the FAN ONLY wire so THANKS SO MUCH! Have a light switch and a fan switch so all the wires were in the wall>ceiling. Just needed bypass the annoying timer/humidity circuit. So just needed switch the brown for the gray wire and all done!

[@stephanemeuyou9901]

I have the same set up - separate light switch and fan switch. Could you please confirm your wiring? Did you do the same as in the video? Black and gray together?

[@squidonthebeach]

Do the instructions on that model make mention of the smart switch?

[@elivazquez2518]

JUSAT WHAT I NEEDED!! Agree their wiring instructions are terrible! This was the solution! THANKS

[@squeekhobby4571]

Thank God. Found this video. Whatever I do , fan never runs unless we have 3 live wires. Only option is to connect black(light) , grey(fan) to a single black from source and connect the whites. I am struggling from a week. Thanks for your help. Useless wiring diagrams. Please note that even ignoring the moisture control connections, we still have to connect the internal wires socket from the moisture control unit (square one) to the unit.

[@08c6vette]

No you don't, If you're not going to use the humidity and timer function you can simply cut the black wire coming from the moisture control unit that feeds the fan outlet (you may have to lengthen it) and use that to directly feed your fan without having to go through the moisture control unit first. Then you can run the fan and light together from one switch or if you have two switches you can control them separately. You can then completely eliminate the moisture control unit and the plugs and wires associated with it if you want.

[@TheRealWilsonator]

In-laws just bought a house with these in two bathrooms. There are two single-pole switches in the junction box, and the current wiring has fan/light on one switch, and a switch that “doesn’t do anything” when flipped. Looks like there’s a hot wire and the red humidity wire going to the worthless switch. Neutrals are all connected with a wire nut, and all but one black/grey are connected with a wire nut. Grounds are twisted together. Is there a way to rewire so the light function is on one switch, and the fan is on the other switch, so they can each run independently?

[@13abelmendoza]

Mine fan makes alot of noise! Any remedies?

[@ArtOfTheWeld]

my fan has 5 wires 1 ground , 1 black , 1 white , 2 solid reds (that say "signal" ,I think that's for the humidity sensor) . my house only has 3 wires ground black white. how would I connect the humidity sensor to power on the fan automatically.?

[@alessandrof2167]

Clear as mud was right ! Thanks for this video

[@carrascodaniel5]

Super helpful. I was pulling my hair out on this wiring. Thanks!!

[@Kyle-gj8qn]

We just had this installed and it's weirdly noisy. Anyone run into this issue?

[@13abelmendoza]

Yes. Just installed mine and it makes alot of noise! I can't figure it out

[@Kyle-gj8qn]

@@13abelmendoza I called the company and they sent a new fan cover. It's apparently a problem. However, they did not send any hardware or instructions to install it without taking the whole thing out. According to our contractor it would require cutting into the ceiling again. 😬

[@13abelmendoza]

@Kyle-gj8qn thanks for the inf. Good luck with yours.

[@johnnydee7480]

Do you have instructions on how to wire to a three-function control? I'm thinking of rewiring it because my switch is very close.

[@kiethuu7734]

Thank you Auggie, had same situation as Barry Hansen. Just subscribed.

[@jj5833]

hello sir, thank you so much for your knowledge and help, how can you help me with my bath light and fan? I have 3 switch on my wall 1 for ceiling light, 1 for mirror light and one for the fan, I also have a black a red/pink a white and a green for the ground in the ceiling with the previous install

[@prettyboyjeremy]

Thank you so much you're a life saver!!!!

[@lateefm]

Thanks for the instructional video, the instructions provided with the product are useless. I would like to know if it is possible to connect brown(humidity/fan timer) and black together and not connect light (gray wire) in order to use humidity/fan timer with fan.

[@dorhinj23]

Bingo! Just right - got this for $60 open box, dont need humidity sensor / timer. THANK YOU

[@alondraavilaa1421]

Hi! Super informational video! I just rented a suite and I’m a nail tech, my landlord said this item was the one I needed to get rid of the monomer smell but I can’t find anything about odor on this item. It just says “humidity” so wrong fan?

[@auggie1790]

This is a very low volume extractor fan. You probably need higher cfm for nail polish odors. But if ok w you, then just use fan function. That's what you need. Humidity sensor would not apply to your application.

[@calvinrai5770]

This was so helpful! Thank you!!!

[@randyw4984]

does anyone know were the run time or humidity adjustment holes are?? the contractor installed the sucker and it runs on and off all day and night. I have looked in there and see no indicators of where I can stick a screwdriver and make an adjustment...Your correct the instructions are crap. thank you in advance

[@DLong-wp8su]

The adjustment opposite side of the vent hole. There are 2 white plastic adjustment screws.

[@DLong-wp8su]

I want to replace my old bathroom fan with a Costco CST80SL BROAN bathroom fan. There are 2 switches 1 for fan and other for light. Can I combine fan + humidity together 1 switch and other for light?

[@DLong-wp8su]

I installed 2 fans today. They are working great. The light/fan on 1 switch and the humidity on other switch. I set my humidity 65% and timer at 7 minutes. It is very useful feature if you want to run 7 more minutes at any humidity in the room without left the light ON, just turn the switch OFF & ON again did the trick.

[@johnbarboo3450]

I wired it for single hot and it is still not working. Checked for power and it is running through it just nothing is turning on. Suggestions?

[@08c6vette]

You’ve probably already figured out the problem as your post was 9 days ago but an easy test to make sure it’s not the unit is to take the fan out of the unit and plug it into a 120v house outlet, if it doesn’t turn on you’ve got a dud, if it does you’ve got something wired wrong.

[@daveqlockard]

And of course instructions like these ae not in the manual... Its almost like they want you to pay $20 for another switch... (and face plate...). Appreciate it, brother!

[@stanglenn4565]

Great video you helped me so much!

[@movewithveronika]

This was SO HELPFUL! Thank you!!

[@markmontes1795]

Ok, so,,,,, I’m confused 😐 What if I want to have the humidifier fan and light all working? How would I connect the wires for those functions? Thank you very much I appreciate your help

[@auggie1790]

Then you need the 3 separate switches like in the vid. One for each function. The wiring example simply replaces the "automatic sensor function" by one turning it off manually along with the light.

[@Romerorios]

Can you combine the fan, h. sensor, and light on one power line?

[@auggie1790]

You could, but as soon as you turn off the light, you also turn off the h sensor. That's why just connect fan and light together.

[@thadmaroon]

What’s the Part number for 3 function switch?

[@mattlucca32]

Can you do humidistat and fan only? I already have a light. Thanks for the video!

[@auggie1790]

Absolutely!

[@mattlucca32]

@@auggie1790 thank you! I wired fan and humidistat but it seems to always stay on when I turn the switch on. Is there a trick?

[@auggie1790]

@@mattlucca32 I must have misunderstood your question. You can do humidity and fan only if you have two separate hots coming off a double switch. ( instead of triple, as shown in vid). If you only have one hot, then it won't work because even when humidity level is reached, the fan only portion will not shut off. I hope that helps!

[@mattlucca32]

@@auggie1790 ok, thank you. Sounds like I need 2 hot with this fan then? Appreciate your gelp

[@auggie1790]

@@mattlucca32 either that, fan only or humidistat only.

[@jshah7668]

Well explained thank you 🙏🏽

[@teresahughes8896]

Thank you and she said the wiring diagram is horrid I was going to take it back but not using the humidifier makes it worth it in OK good video

[@ProfessionalDad]

The thorns in my side have often been at the hands of engineers

[@shankarh6915]

The humidity sensor seems no more than a marketing gimmick and has a mind of its own. Too much trouble to bring in an errant feature. Seems like the best deal is what it portray here, combine the light and fan and be done with it.

[@sumantpatel945]

Short and precise to solve negligence by Broan in not informing complexity of wiring on one circuit 🤷🏽‍♂️

[@DoubleJHas2ManyDoodles]

Green is ground , you need a neutral wire

[@TheDalepl]

Auggie should get free products from Broan for all the returns he saved them from getting!

[@natecastronovo]

Thanks a ton!

[@michaelmcgonigle4315]

Thanks for clarifying , the Manuel as usual makes little sense.

[@Briankucera]

Thank you!

[@berno10]

Thanks for this information 🙏🏾🙏🏾

[@markmontes1795]

Hi! Did you do a new install with the bathroom fan?

[@lesterjamesgundersonkryger7807]

I agree with you

[@georgeniculae1234]

Lost my time with this dude. The hausing will be connected to the grounding ( green) wire, so the circuit will be protected. The owner manual have enough instructions for non electricians like this dude

[@gabegallegos5708]

Thank you!