I have an older honeywell hepa filter and it has a separate hepa button...what does the hepa button do? When I click on it it doesn't seem to do anything...does that mean that the hepa filter isn't working?

Honeywell does not have any serviceable parts. Get a new one.

the foam cover filters the large dust particles and can be washed. It serves to prolong the life of the expensive hepa filter element. Leave it on.

Hi and welcome to DixYa, I am Kelly

The only two parts requiring any service are the activated carbon pre-filter and the HEPA filter. No tools are needed. To change either filter, disassemble the unit as shown.
1. Loosen the carrying handle by turning it counterclockwise and lift filter cage cover from unit.
2. Lift HEPA filter and activated carbon pre-filter from the base.
3. Remove the fasteners from the activated carbon pre-filter and remove it from the HEPA filter cartridge.
4. Replace filter(s) as needed, and discard used filters.
5. Wrap the activated carbon pre-filter around the HEPA filter cartridge and secure it with the fasteners provided

Pictures are here:
http://www.american-allergy-supply.com/hd/hwc.htm

Thanks for choosing FixYa,
Kelly

http://www.honeywellpurifiers.com/ssi/pdf/honeywell/50100-200-300-manual.pdf

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.

PREFILTER:

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

HEPA 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:

is no place to oil it.They have closed type motors. You can just use a lubrificant typeWD40 to spray the mouving parts

Turn off the unit and unplug it. Turn the air purifier on it's side and unscrew the locking mechanism (turn counter-clockwise) on the base of the unit. Remove the base assembly from the unit. Remove the filter assembly and find the seam of the pre-filter. Carefully separate the fastener and then remove the pre-filter from the HEPA filter.

Discard the filter(s) being replaced. Then remove the new filter from the packaging and discard the packaging and plastic. Carefully wrap the pre-filter around the HEPA filter so that the ends meet. Fasten the ends together with the fastener.

Place the filter assembly in the air purifier and reattach the base. Then tighten the locking mechanism. Turn the unit right side up, plug it in and turn it on.

You can find a pdf of the manual here: http://www.honeywellpurifiers.com/product/0-90271-50150-4.html .

I hope this helps.

Cindy Wells
Cindy Wells

http://13520-replacement-charcoal-pre-filters.com/honeywell-enviracaire-hepa-air-cleaner/

you have had the thing for 8 mos try cleaning the hepa filter with a vacuum use the brush type attchment or u might have defective filters go to kaz.com or contact honeywell

To RESET the Electronic Filter Check:
When the filter check light remains on,it is time to check/clean the HEPA-Type
filters and reset the filter check,if needed. With the unit powered on,insert the tip of a ball-point pen or
paperclip into the hole next to the LED filter check light and hold for approximately 5 seconds until the
light turns off (Fig 5). Depending upon your individual usage (environment and hours used),you may need
to check and clean the filters more or less frequently. If the HEPA-Type filters are cleaned before the filter
check light turns on,the filter check should be reset at the same time.
These cleaning intervals are intended as guidelines only. Performance of any filter media is dependent
upon the concentration of contaminates going through the system. High concentrations of contaminates
such as dust,pet dander and smoking will reduce the useful performance of the filter.
NOTE:The HEPA-Type filters are not washable.
Fig.5

Just hold down the reset button.