Question about Sunbeam 701 Humidifier

2 Answers

Working, but not blowing mist.

I've had this for a month and it stopped blowing mist. It ran completely dry last night and I cleaned out the reservoir with the brush and rinsed with warm water from the vegetable sprayer in the kitchen. Now when I turn it on, the fan blows air but there is no mist. Help!

Posted by on

  • 5 more comments 
  • bubbaorion Jan 23, 2008

    blows air but no mist. water level remains same.

  • Anonymous Jan 25, 2008

    Same as the other two.

  • Tom Ule Jan 26, 2008

    Didn't run dry just stopped vaporizing water. Fan works OK

  • Anonymous Jan 30, 2008

    I am having the same problem

  • Anonymous Mar 16, 2008

    Having the same problem too....

  • TJ777 Feb 01, 2009

    It was so odd that after just few uses, the humidifier stopped working. I had cleaned it and was so frustrated that it wasn't working... 11:00 at night, grandchild staying over who started coughing in her sleep... you know the DEAL!!!! The fan was blowing really well--- no mist in sight! I followed the solution here and I did get it to work (Yes!). I do have to add that it was very hard to get the base (grey part) off. But it worked. Thank you and to this site also. Just shows what a concerned Nana and the Internet can do... LOL!

  • jkctlc Feb 04, 2009

    I am having the same issue fan working, no mist, water level the same.



2 Answers

  • Level 1:

    An expert who has achieved level 1.


    An expert whose answer got voted for 2 times.

  • Contributor
  • 1 Answer

I think I found the problem.

unplug humidifer, remove top tank, empty all water out of base. dry off.

turn unit upside down.

unscrew five visible screws.

use a screw driver to pull off the black foam foot pads. you will find more screws there.

pull off the base.

look next to the fan, you will see a metal "tower" going up into the reservoir. Is it dirty such as white chalky substance on it? Clean it with cotton swabs. Clean the fan while your at it if needed.

You will see a small gray box with two metal tabs twisted. Untwist them and pull off the top.

On that metal "tower" you will see a small black chip connected to the circuit board where you just removed the metal top. Does black chip have black marks on the circuit board? Mine does. I suspect the "tower" which draws heat from this black chip was no longer able to cool because of the white chalk buildup on the tower, furthermore, the chip became too hot and caused the black chip to overheat (again black marks on the circuit board).

The chip has on it "FTR 02N" and a "54F" at the bottom. I tried doing some basic searching on internet to see if it could be replaced, but didn't find anything.

For those who don't have this problem yet, just keep that metal cooling tower clean.

Posted on Feb 09, 2008

  • Level 1:

    An expert who has achieved level 1.


    An expert whose answer got voted for 2 times.

  • Contributor
  • 2 Answers

FTR 02N is simply a high frequency transistor. Try to replace it to another type. I have seen FTR 02N in my ultrasonic nebuliser (it's now working.
I think ideal solution is replace all generator circuit. connect a 5 Ohm resistor parallel to the piezoelectric us emitter. Then find simple circuit of negative differential resistor, connect it in series with the emitter to adjustable power supply, then adjust voltage for maximum generating.

Posted on Apr 03, 2008

  • 2 more comments 
  • sifun Apr 06, 2008

    I've found a circuit for the transducer!
    And here:

  • sifun Apr 06, 2008

    FTR 02N can be replaced with 2SC4153!
    2SC4153 is specified for this application.

  • sifun Apr 09, 2008

    I assembled one of the upper circuits and i can say: it works.
    I used a transistor from some office technics D1762.
    You can replace it with any high-frequency(fT~50-100 MHz) transistor.

  • Russ JD
    Russ JD Dec 18, 2012

    How about Radio Shack - TIP31 NPN Transistor or TIP120 NPN-D Transistor or NTE2633 - T-NPN SI High-Frequency Video Driver



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Tank is full, but after a few minutes why does it stop and the 'Tank Empty' light comes on?

Reset light comes on, unit stops operating when tank is full ...
Feb 6, 2008 - Question about Vicks Warm Mist V745A 1 Gallon Humidifier ... Tank is full. ... for about another 5 minutes when the unit stops, reset light comes on etc. ...the humidifier since the reset light keeps going on immediately after I turn ... water in the tank because of course, the heater is on, but no water is getting ...

How to Fix a Humidifier ' HomeTips

Jan 17, 2016 | Humidifiers

1 Answer

My Sunbeam 705 Humidifier shut down.

Generally a shut down is due to an empty water container or the float valve. If you have a can of compressed air, you can blow dry the integral ports and perhaps free up any contamination that has caused the unit to shut down.

Feb 07, 2018 | Sunbeam Humidifiers

1 Answer

Wont blow out mist

it has a quiet operation when you got it brand new did it put out mist

Nov 02, 2012 | Vicks Cool Mist V400 Humidifier

1 Answer

My humidifier which is suppose to mist seems to only have the fan blowing. No mist. Lost the manuel and the machine was purchased in feb of 11. What is the solution?

It may have a scale and calcium build up. Particularly, if you use well water.

To clean it, unplug the unit and empty in water that is in the tank. Mix a 50/50 solution of White Vinegar and Bottled Distilled Water (enough to fill the tank. Pour the solution in the tank and allow it to set for 2 hours. Then turn the humidifier ON and place you hand in front of the misting nozzle , to feel if it's working. If it is, allow it to run until the tank is 3/4's empty, Empty te tank of the remaining solution and refill the tank with more Bottled Distilled Water and run for an hour. This will flush the 50/50 solution out of the system. It it wasn't working when you first tested it, allow it to set over night and try again the next morning.

In the future, use Bottled Distilled Water rather than tap water.

95% of the time, this will solve the problem. I hope this helped you. Please let me know.

May 06, 2011 | Walgreens Cool Mist Humidifier Humidifier

1 Answer

It has stopped working. How do I clean it. Can the element be washed with soap?

Best way to clean it is with vinegar, it will break up the mineral deposits I'm sure the element has on it. If it is like mine the element is covered in white scale, and has stopped working. May not be worth the effort though, my element is now completely clean but the unit still auto-shuts off after about 5 min.

Mar 09, 2011 | Vicks Warm Mist V745A 1 Gallon Humidifier

2 Answers

No mist!

unfortunately on a cool mist unit the mist shouldn't show up. on most units that's what it does. the warm mist units show the mist.. the best way to tell is if you put your hand over the spout that the mist is suppose to come out of for about 2 minutes and you pull it away and it feel clammy then it's working. if your hand is still dry please let me know and i'll see what else i can do for you.

Feb 26, 2009 | Holmes Products HM500-UC 1 Gallon...

3 Answers

Cool Mist Humidifier Filter Drying Out

How long are you going between filter changes?

A filter that stops wicking water up and turns orange/yellow is one full of deposits.

It sounds like you have hard water. How are you filtering this water before you use it? Distilled water is the best.

Replace the filter. They don't last forever. Mine normally last a month to a month and a half.

Good Luck

Feb 10, 2008 | Honeywell QuietCare HCM-630 Humidifier

1 Answer

Humidifier stopped working after cleaning.

It started working again on its own. Not much of a solution!

I think some water must have got into the electronics and then once it dried, the humidifier started to work again.


Feb 07, 2008 | Bionaire Warm Mist BWM0400-U Humidifier

4 Answers

Water on floor around humidifier

I haven't had any problems with my Vicks Cool Mist Humidifier other than the fact that the area surrounding it is slightly wet after operating for a couple of hours....While I understand that I was using this to moisturize the air during a cold, I knew this would happen, because the air in my room is not dry. If the room isn't dry, the mist that it's putting out in to the air has no where to go but surround the humidifier. All I did to stop this was to buy a water proof mat. I suggest you do the same -- Also, in regards to the water smelling -- You should be cleaning out and drying the basin after every use. Water shouldn't smell unless you let it stagnate inside the plastic -- Try running distilled vinegar through the machine for a couple of minutes -- Also, I would use an extension cord and let it run outside so that your house doesnt smell like Vinegar.

Oct 18, 2007 | Vicks Cool Mist V400 Humidifier

Not finding what you are looking for?
Sunbeam 701 Humidifier Logo

4,618 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sunbeam Humidifiers Experts


Level 3 Expert

79186 Answers

Oloyede Monsuru

Level 3 Expert

1417 Answers


Level 2 Expert

85 Answers

Are you a Sunbeam Humidifier Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides