Maytag ATB1821AR series Service Manual page 31

To avoid risk of electrical shock that can cause death or severe personal injury, disconnect unit from power before
servicing unless tests require power. Discharge capacitors through a 10,000-ohm resistor before handling. Wires
removed during disassembly must be replaced on correct terminals to ensure proper grounding and polarization.
Shunt made of 14-gauge wire
3. Test points T and H will verify the bimetal thermostat
is open or closed.
• Force motor run by shunting T to H.
• If motor doesn't run, motor is faulty. Replace ice
maker.
• If motor does run, bimetal thermostat is faulty.
Replace ice maker.
NOTE: Make sure freezer temperature is cold enough
to close the bimetal thermostat.
4. Leave jumper in for half a revolution, then touch
heater mold.
• If mold feels warm, heater works properly.
• If mold doesn't feel warm, heater is faulty.
Replace ice maker.
5. Remove jumper and water valve will energize in
last half of revolution, if mold heater has not
failed.
NOTE: Make sure freezer temperature is cold enough
to close the bimetal thermostat.
M O
ODULE
(
NO POWER TO ICE MAKER
EJECTOR BLADES IN END
T P C
EST OINTS OMPONENT
L & H Mold Heater
L & M Motor
M V C
ODULE OLTAGE HECKS WITH
(
POWER TO ICE MAKER
T P C
EST OINTS OMPONENT
L & N Module
T & H Bimetal
L & H Heater
L & M Motor
N & V Water Valve
©2005 Maytag Services
!
C
HMMETER HECKS
;
- - )
OF CYCLE POSITION
M O
ODULE HMS
P
OSITION
Attached 264
to support
Separated 16,100
from heater
M T L
ETER OR EST IGHT
)
L V 0
INE OLTAGE VOLTS
Power OK No Power
Open Closed
On Off
On Off
On Off
WARNING
Disassembly
NOTE: Mold & heater assembly, module assembly,
support assembly and thermostat are not
replaceable. If any of those components are
faulty, ice maker must be replaced as a unit.
1. Snap plastic cover off module.
2. Pull shut-off arm out back of support assembly.
NOTE: When reassembling unit, be sure to push shut-
off arm as far as it will go into bushing in back
of support assembly.
3. At side of mold & heater assembly, pull thermal
fuse out of its clip (See "Thermal Fuse," P. 41).
4. Remove wiring harness by depressing retainer tab
as you pull the plug out.
5. Reach into mold anchor-screw access ports with a
Phillips screwdriver and loosen two mold anchor
screws. Then pull support assembly away from
mold.
6. Remove three module anchor screws and pull
module out of support assembly.
7. Pull stripper and ejector off module.
NOTE: During reassembly, align "D" shape of ejector
shaft with "D" shaped socket in module cam.
8. Remove fill cup. Finally (if desired) remove thermal
fuse clip and ice maker bracket.
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