Tip & How-To about Maytag Neptune MAH5500B Front Load Washer
Component failures on Maytag Neptune Font Load Washers such as the pressure switch, wax motor, hot and cold water valve solenoids, timer motor, 24 VDC circuit, and the overall electrical buffer circuit have significant effect on the machine control board. Failed resistors on the machine control board can be used to determine failed washer components. Resistor R9 is associated with the pressure switch, R11 is for the wax motor, R51 for the hot water valve solenoid, R52 for the timer motor, R53 for the cold water valve solenoid, R143 for the 24 VDC circuit, and R162 for the overall electrical buffer circuit. The TRIAC Q6 is also associated with the wax motor while TRIACS Q3, Q9, and Q17 are for the timer motor, cold water valve solenoid, and hot water valve solenoid respectively. These TRIACS must also be replaced should the corresponding resistors fail or burn out especially when there's no power going to the associated component.
The most common problem experienced is the failure of the wax motor as indicated by the inability of the washer to advance to the high speed spin cycle with the "door locked" light not lit. Replace the TRIAC Q6 and the resistor R11 on the machine control board to get the machine back into operation. Use MAC97A6 or NTE5656 for Q6 and a 3.9 kilo-ohms carbon or carbon film resistor for R11. It is recommended to install a 1/2-ampere pico fuse in series with the wax motor to prevent damage to Q6 and R11 should the wax motor shorts out and fails again.
Replacement of the wax motor is a must before installing the repaired or new machine control board to prevent damage to the repaired or new part. Make sure the wiring harness connections of washer components are good and snug fit. Reseat the connectors several times to clean off corrosion build up both on the connectors and terminals.
Posted by Jan McZeal on
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