Maytag MTB1893ARS Operations Instructions download pdf (Page 34)

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.

Thermal Fuse

A one-time thermal fuse, incorporated into the ice maker

wiring harness, protects the plastic liner from melting if

the ice maker overheats. The thermal fuse is spliced into

the red wire of the ice maker harness. It is a

nonresettable fuse, and it is designed to blow at 170°F

(78° C).

Presence of this fuse in the circuit means that a "No Ice"

complaint could be caused by excessive heat. Where

overheating is the problem, replacement of the wiring

harness is a temporary solution. The ice maker should

also be replaced.

CAUTION

To minimize risk of property damage, do not

overtighten connection to household water supply.

Always test for leaks after repair or replacement of

water valve.

Water Valve

When the solenoid is energized, the amount of water

allowed to enter the ice-maker mold is determined by two

factors:

• Duration of the timing cam that closes the water

switch.

• Water pressure present in the tubes.

Proper ice maker fill is 140 ± 10 cc in 7.5 seconds of

water fill time at an inlet pressure of 20 to 120 PSI (1.4 to

8.2 bar).

Inside the valve, a flow washer acts as a water pressure

regulator. This results in a pressure drop across the

valve of 20 to 120 psi (1.4 to 8.2 bar). The valve

incorporates an 80-mesh screen water strainer.

115 VA

Copper Strips

on Backside of Drive Gear

Wiring Diagram

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 56 57

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Maytag MTB1893ARS Operations Instructions Page 34