Kenmore K90-150 Owner's Manual page 35

BLOWER STARTS
YES
CHART 1
OPEN
TROUBLESHOOTING CHART #3
N_ CHECK FOR VAC N___
BETWEEN TERMINALS 1 AND 3
AT CONNECTOR CN4 ON 18C
YES
I CHECK FOR 120 VAC AT
INO I
BLOWER LEADS ON WIRING
I-'1
HARNESS
YES
I REPAIR/REPLACE
BLOWER I
_P
I PURGELIGHTON? _'_
YES
]SO WAITS UP TO S
MINUTES FOR NORMALLY
OPEN AIR
PRESSURE SWITCH
CONTACTS TO CLOSE,
INDICATING BLOWER
SUCTION IS
PRESENT
REPLACE IBC ]
REPAIR/REPLCE
WIRING FROM IBC
TO BLOWER
PRESSURE SWITCH
CONTACTB
OPEN
ARE VENT PIPE AND AIR
INTAKE PIPE CLEAR
(NO BLOCKAGE)
YES
CHECK AIR
PRESSURE SWITCH PER
INSTRUCTIONS ON
FOLLOWING PAGES. ARE
SAMPLING LINES CLEAR
AND CONNECTED
PROPERLY?
,_YES
CHECK FLUE PASSAGES
IN BOILER PER
"MAINTENACE AND
CLEANING". ARE FLUE
___ CLEAN OUT VENT PIPE
AND/OR AIR INTAKE PIPE.
CHECK FOR SAGS OR
LOW SPOTS WHERE
CONDENSATE MAY
PUDDLE AND BLOCK
THE VENT
t__ CLEAN OUT BAMPUNG
LINES OR REPLACE
DEFECTIVE SWITCH
t__ CLEAN BOILER FLUE [
PASSAGES PER
MAINTENANCE AND
CLEANING INSTRUCTIONS
PASSAGES IN BOILER CLEAN?
YES
CHECK DRAFT INDUCER
MOTOR RPM, IS IT
3400-36007
YES
CHECK FOR BROKEN OR
LOOSE IMPELLER ON DRAFT
INDUCER AND REPLACE
BLOWER IF FOUND TO
BE BROKEN OR LOOSE
15 SECOND PRE PURGE COMPLETE.
PURGE LIGHT IS OFF. SIMULTANEOUSLY
IGNITOR LIGHT IS ON AS IGNITOR CIRCUIT
IS ENERGIZED.
REPLACE IBC
_. YEHSART 4
REPLACE I BLOWER