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if your air filter has dirt in it you might not be able to see dirt but its there it filters fine particals of it you probably need to replace the filter because it forceing the purifier to work hard and shut off
<span style="font-weight: bold;">Airgle Air Purifier:</span><br />
<ol>
<li>Turn off and unplug the unit </li>
<li>Press the light button to the "on" position </li>
<li>Plug in the unit, and then release the button after the Filter-check starts</li>
<li>The system will automatically reset the Filter-Check Gauge in about 25 seconds</li>
<li>Once the procedure has completed resetting, please turn on the unit and press "Filter Check" button again.</li>
<li>This time, the system should report an accurate result.
</li></ol><span style="font-weight: bold;">Alive Air Purifier:</span><br />
<ol>
<li>Insert a straightened out paper clip into the reset hole, with the unit off, and push the Timer button.</li>
<li>You should hear a 2 beeps, signaling that the Reset was successful.</li></ol><span style="font-weight: bold;">Holmes Air Purifier:</span><br />
<ol>
<li>Units which have an indicator light must be
reset once the HEPA filter has been replaced. Reset indicator by inserting
a small object (such as a pin
or paperclip) into the hole marked reset.</li></ol><span style="font-weight: bold;">Honeywell Air Purifier:</span><br />
<ol>
<li>Reset the filter indicator by pressing and holding the "Filter Monitor" button until the indicator light shuts off.</li></ol>or<br />
<ol>
<li>With the unit powered on, press and hold the appropriate filter<br />indicator button down for approximately 10 seconds until the<br />light turns off.</li></ol><span style="font-weight: bold;">Hunter Air Purifier:</span><br />
<ol>
<li>Change the filter and/or pre-filter.</li>
<li>Now, you must choose which counter you want to reset. Press and hold the filter reset key (approximately three seconds) until the prefilter indicator flashes. Press and release the reset key again to alternate between the two indicators. The counter that will be reset is designated by the flashing indicator. For Models 36394 and 36395: Use the tip of a pen or pencil to press the key.</li>
<li>Once you have the correct indicator flashing, press and hold the reset key for three seconds to reset that counter to zero hours. The indicator will stop flashing when it has been reset. If needed, repeat these steps to reset the other counter.</li></ol><span style="font-weight: bold;">IQAir Air Purifier:</span><br />
<ol>
<li>To reach the Filter Life Reset function from the main display window, press the Menu key seven times.</li>
<li>Press and hold the Enter key until the flashing cursor appears. Release the Enter key. The first filter selection to appear is the Pre-Filter.</li>
<li>Press the Up Arrow key to select the filter that has been replaced. The Filter Life LED for the appropriate filter is now flashing red.</li>
<li>Press the Enter key to confirm that the selected filter has been replaced. The filter life LED for the appropriate filter is now flashing red.</li>
<li>Press the Enter key one more time to confirm the filter change or to exit without resetting the filter life, press the Menu key (M=Menu).</li>
<li>Upon successful reset of the filter life, the new remaining filter life (taking the currently selected fan speed into account) will be displayed, and the filter LED light on the control panel will change from red to green.</li></ol><span style="font-weight: bold;">Kenmore Air Purifier:</span><br />
<ol>
<li>Press the FUNCTION and OFF TIMER buttons at the same time for five
seconds. The CHANGE FILTER INDICATOR will flash five times and turn off
</li></ol>
I had similar issues and by replacing the 2200 micro (Mu) Farad, 10 Volt capacitor on the PCB, all of my issues ceased.
Below is a link with information supplied by "fixya" that explains the procedure/details.
Hopefully this will solve your current issues.
Good luck,
Mike http://potlash.org/feast/2010/11/20/repairing-a-jet-afs-1000b/
PS Linda Haus of "Rockler" Technical Support was kind enough to supply me with this link.
Remove the front cover and locate the FILTER RESET button above the dust sensor level indicator lights. Press and hold this button for 3 seconds until the unit emits a beep and the REPLACE FILTER light goes out.
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.
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