Maytag MTB1891AR series, Service Manual

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!
WARNING
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.
©2005 Maytag Services
A - 7 16025860
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8. 8. Apply fresh coat of Alumilastic to thermostat
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Little or no Alumilastic on thermostat
Module housing damaged
Heater pins too short; don't contact module
Kinked water tube
Open or missing thermostat
Tighten housing-to-mold screws (20-26 in. lb.
or 22.8-29.6 cm/kg) Housing-to-mold screws not seated
Broken shut-off lever (mislocated shut-off switch) Replace ice maker
Heater not staked in mold Replace ice maker
Wrong heater temperature Replace ice maker
Replace ice maker
Bail shut-off arm misformed Replace bail shut-off arm
Bail shut-off arm binds when raised or lowered
Water or ice in actuator/housing hole Remove module; dry actuator & housing holes
Actuator O.D. large or burred Replace ice maker
Housing hole small or burred Repair or replace ice maker
Replace ice maker
Bail shut-off arm in vacation mode — no ice Lower bail shut-off arm to begin cycle
Pressure must be 20 to 120 psi (1.4 to 8.2 bar).
Test by jumping "T" to "H" for 7.5 seconds;
then remove jumpers; catch water in glass.
Should be about 140 cc's. Low water pressure
Open heater circuit Replace ice maker
Closed thermostat Replace ice maker
Damaged heater tulips on module Replace ice maker
Clogged water valve Replace water valve
No power to water valve Trace power to locate discontinuity
Un-kink water tube; check for weak spots
Clogged water tube to ice maker or refrigerator Clear stoppage
Jammed cubes (Notice cube size; hollow?) Clear cube jam; check fill tube & fill cup
Little or no water to ice maker (Notice cube size)
Frozen fill tube (leaky water valve) Replace water valve
Replace ice maker
No power to ice maker (harness) Trace power to locate discontinuity
No Ice or Low Ice Production
Motor stalled or stripped Replace ice maker
Adjust or repair freezer
Replace ice maker
Check ejector position
Contaminated module (Doesn't run when jumped
through "T" and "H" probe holes) Replace ice maker
Freezer not cold enough
Module shut-off switch and contacts shorted & burned
Broken locking tab on vertical cam
Park (ejector at 2:30 position)
Replace ice maker
Ejector in 3:00 position
Contamination Replace ice maker
Jammed cubes (Notice cube size; hollow?) Clear cube jam
Ice maker or refrigerator not level Level as necessary
No power to ice maker Trace power to locate discontinuity
Ejector in 4:00 position
Contamination Replace ice maker
Adjust volume screw on module, change water
valve or lower water pressure Excessive water-fill volume
Rack of cubes fell back into mold during ejection Install new fill cup; check fill tube assembly
Thermostat out of calibration Replace ice maker
Open heater circuit (motor should be oscillating) Replace ice maker
Broken locking tabs on vertical cam Replace ice maker
Little or no Alumilastic on thermostat Apply fresh coat of Alumilastic to thermostat
Heater not staked in mold Replace ice maker
Icemaker Troubleshooting Chart