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Kenmore 303.93661 FURNACE HUMIDIFIER MAINTENANCE
(APPLY THIS LABEL WHERE EASILY SEEN)
Cleaning frequency is dependent upon mineral content of water supply.
Check every other week until schedule can be determined.
1. Turn humidistat to "minimum setting."
2. Disconnect water at humidifier using quick disconnect.
3. Remove front panel, remove overflow tubing (if used), slide out reservoir and media wheel assembly
while raising latch on right hand side.
4. Lift out media wheel by flexing wire support outward to release shaft.
5. Pull out pivot pin, remove float and arm.
6. Empty water from reservoir.
7. Lift out reservoir liner and replace (part number 215711-01), or clean.
8. Clean residue and lime build-up from all parts using a solution of vinegar and water, detergent and
water, or Sears All-Purpose Humidifier Cleaner (stock number 42-14713).
9. Remove media pad from wheel and clean thoroughly; replace pad if necessary - available from Sears
(stock number 42-9335).
IMPORTANT: Stretch new pad lengthwise before placing in wheel.
10. If the reservoir has been overflowing the float valve button may be worn. Remove float valve button,
turn over and reinsert or replace if both surfaces are worn. (Part Number 281101-01)
11. Reassemble parts in reservoir (Flex wire support outward to capture media wheel shaft under
dimples) and slide back into humidifier. Engage latch on right hand side with float valve stem.
12. Attach water supply quick connect, attach overflow tubing (if used), and allow reservoir to fill.
13. Check water level and adjust float if required.
14. Turn humidistat to "test" momentarily and check for media wheel rotation. Reset humidistat
according to outdoor temperature as instructed on label and reinstall front cover. Unit is back in
operation.
Summer Shutdown
Unplug transformer, close saddle valve, close bypass damper. Clean per above and leave
reservoir empty. (As a reminder you may want to put a tag or sticker on the unit indicating it has
been shutdown and will require startup in the fall.)
Fall Startup
Plug in transformer, open saddle valve, open bypass damper and set humidistat to "test". Check for
proper water level and media wheel operation. Reset humidistat according to the outdoor temperature as
instructed on label. Unit is back in operation.
PIN 21604001R10-00