Question about Jet AFS-1000B Air Purifier

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Runs but not for long and now the motor simply hums.

Hi, I have the same issues as others with my Jet Air Filtration system. What I did different was I hot wired the motor directly and it works just fine which focused the err on the PCB capacitor. Your explanation on fixing the PCB is wonderful but I have a question. You mention using a 1000F, 10V cap but the one I removed from the board is actually a 2200F, 10V one. Would you please explain why you used a 1000F one and is that the real fix? I ordered a 2200F one but now I'm wondering. Thanks in advance for your assistance! Mike

Posted by Mike on

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Brad Brown

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Stay with the one that you ordered. There is no variance allowed between 2200 uF and 1000. The voltage is the variance that you are allowed to change.

Posted on Dec 16, 2013

Testimonial: "Thanks Brad & that's what I thought but for some reason all fixes referenced a 1000microF capacitor not a 2200 microF one. Because mine is a 2200 that's what I ordered and will install. Do you know where I could possibly get a drawing showing the PCB cicuitry?"

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1 Answer

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If the fan motor itself is grinding/losing a bearing, you will need to replace the motor. Note that there are different models/configurations for various models, you need the right one. I used to buy mine direct from EcoQuest, but they've changed owners in the last year, don't know if they still sell them as parts.

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I think I have one fan motor left in-stock (new); I can check to see if it's the right version if you want. I'd want $30 for it, plus shipping - you can likely do better than that if you're willing to hunt.

If I can be of further assistance, or if you have questions about any of my response(s), please let me know before rating me.

If this solves the issue, please rate it accordingly. My goal is to earn a "FixYa" rating from everyone I help.

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These units usually put out ozone into the air in your home which is a known lung irritant. Sometimes they will call it an ionizer or something like that. If you truly have indoor air quality issues the only way to properly attack it is through three steps
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Squeek


Hi Wendie286,

I just answered your other posting which described a low "humming" sound. A squeak is different. Then it's very likely the motor. You could try a _very_ small/light application of oil to the shaft where it goes into the bearings, but that's probably a short-term fix.

If the unit is over 10 years old, the motor will probably need to be replaced at some point. Below is the relevant portion of my response in your other posting.

========================================================

[fan motors]... are the only moving parts and do eventually wear-out. If it's still turning, it shouldn't be a problem - - if it starts turning slower and slower, it's time to plan a replacement motor. I have a couple, but I think FixYa's terms forbid me selling it to you directly. Recommended solutions in this case:
1) If you still know an active dealer, you might see if they have any, or if they know of a source (Ecoquest no longer supports them with spare parts).
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If you write back with more details, I may be able to offer more precise guidance. If you want, I could try web-searching again.

If I can be of further assistance, or if you have questions, let me know before rating me.

If this solves the issue, please rate it accordingly. My goal is to earn a "FixYa" rating from everyone I help.

Thanks for using Fixya.com,

Jon

Jan 18, 2009 | Alpine Air XL-15 Air Purifier

1 Answer

DOESN'T RUN ANYMORE


Check the capacitors. There are two to look for, one on the motor, the other on the PC controller board. 
STEP ONE: Unplug the unit and support it on a table. 

STEP TWO: remove the controller board from the exhaust side of the unit by unscrewing the screws holding the cover to the unit. Unplug the motor wire harness by pressing down on the white retaining clip. They go only one way, but it doesn’t hurt to note which is which. 

STEP THREE: Unbolt the ground wire from the face plate and the whole board should come out. Unscrew the four screws holding the PC board. Look for a little foam pad that will drop out. Remember where to replace it. Screws and capacitor may have blue locktite on them. 

STEP FOUR: Find the capacitor. It’s the part that looks like a tootsie roll, black with two wires coming out one side. It’s between the CPU chip and the big red square block. If it looks bloated, burnt or melted, you found the problem. Replace it with a 1000 microfarad (1000 uf/ 10 volt) ten volt capacitor with a radial lead. About $5 for the part at most electronic parts stores. Careful desoldering the old capacitor to avoid damaging the PC board. WATCH THE POLARITY. There is a negative and positive side. The negative side has a chevron (<) mark and is marked on the PC board. On mine the negative side was nearest the black micro chip and the positive side was towards the red JEFU MPE part. Use a little bolt-tite on the screws of the PC board and some on the capacitor on the PC board to limit vibration. Reinstall the board, plug it in and give it a whirl. 

If no joy, STEP FIVE: Find the motor start capacitor. It is bolted near the motor, black about 1x 2 x 4 and has two red wires coming out of it. Take a battery operated resistance meter on a setting of R x 100 or higher. Charge the capacitor by connection one lead of the tester to one red wire and the other lead to the second red wire. You may have to strip the wire to make contact. Next reverse the leads and you should see the needle jump. Do it a third time incase the first try was discharging. If no needle jumping, replace capacitor. Couldn’t find this locally. May have to by directly from JET Tools. L

Recommend you hard crimp wire splices if cutting off the motor capacitor. .  You can check the windings on the motor too. Check for continuity between the white-yellow-blue-black wires of the motor harness. Any combination should work. If not, motor shot, time for some bigger bucks nrepair.
 
Hope this helps.

Jan 06, 2008 | Jet AFS-1000B Air Purifier

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