Question about Kenmore 335 CADR Air Purifier

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How to "reset" the carbon filter dirtiness scale?

Just replaced with a new carbon prefilter and dont know how to reset the meter -- I pressed the reset button but nothing happens! Any ideas? Thanks!

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  • parrotkeeper Feb 20, 2009

    Thank you very much! Your solution worked perfectly, I am very grateful! Have a wonderful rest of the year!



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Make it holding the button between 10 & 15 seconds & it works. THANKS

Posted on Feb 20, 2009


It looks like your model is the same as mine. You will need to press and hold the reset button for 5 seconds. I hope this helps.

Posted on Jun 06, 2008


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Posted on Jan 02, 2017

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Can you add a prefilter to an oreck truman cell to grab the larger dust particles and decrease the zapping?a humidifier in the room helps but when the furnace is going it can still be often.

it should have a prefilter already on it. they have a screen looking filter that goes on the front of the cell. If you don't have one you need to get one. You should also have a charcoal filter on the back side of the cell, if not then you'll need to get one of those also, the charcoal is for odors and not for filtering dust. Putting any other type of filter in front of the cell will just be turning this into a filter type cleaner and will be defeating the purpose of the reusable Trueman cell. You may as well just buy a different cleaner if you don't mind buying new filters instead of cleaning the cell. I would recommend cleaning the cell every 2 weeks to keep it working properly. This will also keep it from snapping, if yours is snapping it's already too dirty and needs to be cleaned, if it's snapping right after it's cleaned then you have a plate that is arcing in the Trueman Cell, I have posted a fix for the ProSheild Models to stop the cell plates from arcing.

Feb 19, 2015 | Oreck Air Purifiers


How to Reset Your Air Purifier Filter Light

<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>

on Jun 17, 2011 | Air Purifiers

1 Answer

Furnace stop working after cleaning the electronic air cleaner F50

Try this educational video: It could be something as simple as a pressure switch.

I hope I helped you out!

Apr 01, 2017 | Honeywell (F50F1032) Air Purifier

3 Answers

I had a honeywell hepa air purifier 50250 given to me as a gift with no owners manual! Is there somewhere I can get one? also, there is buttons on the top, one saying check filter and the other saying pre...

The Intelli-Check™ Filter Monitors will indicate replacement of the pre-filter and the

HEPA filter. Depending upon your individual usage (environment and hours used),

you may need to check and replace the filters more or less frequently.

To check Expected Filter Life Usage

When the unit is turned on, quickly press the appropriate filter monitor button. The

pre-filter light will flash up to 3 times and the HEPA filter light will flash up to 4 times,

depending upon how much expected filter life has been used.


1 flash = from new, up to 1/3 expected life used up

2 flashes = between 1/3 and 2/3 expected life used up

3 flashes = between 2/3 and all of expected life used up

Remains on = time to check/replace pre-filter


1 flash = from new, up to 1/4 expected life used up

2 flashes = between 1/4 and 1/2 expected life used up

3 flashes = between 1/2 and 3/4 expected life used up

4 flashes = between 3/4 and all of expected life used up

Remains on = time to check/replace HEPA filter

To RESET Filter Monitor

When the filter monitor light remains on, it is time to check/replace the filter and reset

the filter monitor, if needed. With the unit powered on, press and hold the appropriate

filter monitor button down for approximately 5 seconds until the light turns off.
Depending upon your individual usage (environment and hours
Page 6:

Mar 29, 2011 | Kaz Honeywell Hepa Air Cleaner (50250) Air...

1 Answer

I just found out we have an enviracaire elite system in the attic which was switched off. how do we clean it? does it have a removable filter? Model: 2084175 120 vacd 60HZ dim: 18 x 25 -- thanks -- ...

CLEANING PREFILTER(S), CELL(S) AND POSTFILTER(S) CAUTION Sharp edges. Can cause personal injury. Carefully handle cell(s) or wear protective gloves to avoid cuts from sharp metal edges. Setting a regular cleaning schedule To ensure optimum performance from the air cleaner, the prefilter(s) and cell(s) must be cleaned regularly- twice a year with normal use or more frequently with heavy use. Use the wash reminder schedule below to help establish and maintain a regular cleaning schedule. Mount the wash reminder schedule in a convenient location. NOTE: You may let the heating or air conditioning system operate normally while the cell(s) are being washed. Simply turn off the air cleaner switch. Cleaning your Prefilter 1. The quickest and easiest way to clean your prefilter is to use the brush attachment of your vacuum cleaner to vacuum the lint off the dirty side of the prefilter. Greasy dirt may require soaking the prefilter in a tub or rinsing with the garden hose. Do not wash the prefilter in the dishwasher or car wash 2. The prefilter should be cleaned every 6 months or more frequently with heavy use. This will keep the prefilter clean of air choking lint that can make your system work harder. Vacuum the prefilter with a brush attachment, rinse it with a hose, or soak it in a tub. Do not wash the prefilter(s) in the dishwasher or car wash. Cleaning your Cells 1. A quick cleaning of the cells can be done by simply wiping down the ionizer wires with a damp cloth. This will help boost the efficiency of the air cleaner between full cleaning cycles. Ths quick clean can be done every time the prefilters are cleaned. 2. A full cleaning of the cells will return the air cleaner to its peak efficiency. An easy way to wash the cells is in a tub of hot, soapy water. Just soak the cells until the water cools, agitate and rinse. For details on cleaning cells, see below for Washing the cell(s) in a tub or Washing the cell(s) in your automatic dishwasher. 3. Because the efficiency of the air cleaner remains high even as it loads up with dirt, a full cleaning of the cells can be put off for yearly maintenance and a quick cleaning can be done more often. Those wishing to renew to peak efficiency or with heavier use may want to wash more frequently. Replacing your Postfilter 1. The postfilter is an optional filter that boosts the efficiency of the air cleaner. Do not wash the postfilter because that will neutralize the factory applied charge. 2. The postfilter should be replaced every six months to ensure peak performance.

Mar 03, 2011 | Honeywell Enviracaire Elite F300E-1019 Air...

1 Answer

Are there filters that have to be changed and where do you get them?

Yes. You will have a prefilter and after that you will have a HEPA filter. Keep good maintenance on the prefilters which are not washable. You will need to check it once a month to see if it is time to replace. If you have good maintenance on the unit and change the cheaper prefilter, you will get years of service out of you HEPA filter. Bad maintenance means replacing the HEPA filter which is a good chunk of the cost of the purifier.

Sep 28, 2010 | Kenmore 335 CADR Air Purifier

1 Answer

Honeywell F50A does not clean well

sounds like it is working. You could replace the cells and prefilters with a disposable box filter that fits.

Sep 23, 2009 | Honeywell (F50F1073) Air Purifier

1 Answer

What and where is the prefilter

the pre filters(2) are the screens just before the cells

Sep 07, 2009 | Honeywell Enviracaire Elite F300E-1019 Air...

1 Answer

Will not start up??

there is only one other thing that i can think of that might work ifyou haven't done that yet. right above the timer button there is a small pin hole. that is your reset button. you need like a safety pin or something really small to go in that hole. hold it for about 3 seconds. take the pin out and the system should reset back to normal. sometimes when you clean the filters that happens. not every time but sometimes. Now if that doesn't work. i would call the manufacturer again so see if they have any other solutions or if they can send you one more. I do apologize for the inconvenience. I will keep looking for you to see if there is anything else that i can suggest but try that first.

Aug 26, 2008 | Bionaire BAP1500-U Air Purifier

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