Whirlpool MFW 9700S, MFW 9600S manual Pressure Switch

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PRESSURE SWITCH

The pressure switch is located in the top right rear corner of the washer. This switch senses water level in the wash tub. The control signal from the pressure switch is sent to the Central Control Unit and is used to determine the amount of water introduced into the wash tub during the wash cycle.

The pressure switch also senses the suds level in the wash tub. If excessive sudsing occurs, the washer starts an automatic suds routine. The display will show the word “Sud.” The automatic suds routine adds additional rinse and drain operations until the suds level is reduced.

If an overfill condition is detected by the pres- sure switch, the CCU will turn on the drain pump and attempt to stop filling.

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Contents Epic Forward Goals and ObjectivesTable of Contents Wiring Diagram Safety First GeneralSerial Number Model & Serial Number DesignationsModel Number Model & Serial Number Label Tech Sheet Locations Specifications Maytag Corporation Major Appliance Warranty Page 1234566541728919243 793729327 867544562726757947867 75445627834473#678#87968258928 $4487968258928Electrician+ 1233456768479346724 2273$%&%*$% ,&## 2$&+1234546#2&%2$!#2 &-.0$$+&. /+2+$ &+&+$&#0 388 7877878 #$%2&&8$87Theory of Operation AIR Vent System Pressure Switch TOUCHPAD/LED Assembly Central Control Unit CCUMotor Control Unit MCU Drive MotorSuspension System Pump MotorECO Valve Interlock Switches Heating Element Temperature SensorDoor LOCK/SWITCH Assembly 971771997 7271742OFF5678979779799 823456789635876979594792869795947679476 3462869795947679475694878594587 Modifier6.76676567786676712345678938294587 123455367892234563789 345647682 7397826739868934345$747 #5&61234567 Sturdy colorfast fabrics12345678935 888 88#$8977 89777989777 77 7#### Ordisconnect83783power83783 1234567 35 37 5 67 123456376468with liquid detergent64326%9894 %2435263 8312345674674 9728879Component Access Component LocationsRemoving the Console and the Touchpad / LED Assembly To remove the consoleTo remove the touchpad / LED assem- bly Door Lock/Switch Assembly Bellows Retaining Wire On the next To remove the door lock/switch as- semblyTo remove the front panel and bellows Remove the end of the dispenser tube from the bellows Removing the Flowmeter Removing the Detergent Dispenser Motor & Assembly To remove the detergent dispenser motorTo remove the detergent dispenser as- sembly Removing the Inlet Valves Removing the Central Control Unit Removing the Interference Filter Removing the Pressure Switch Removing the Motor Controller Wire Standoff To remove the heating element Removing the Temperature Sensor Heating ElementTo remove the temperature sensor Removing the Drain Pump Assembly Removing the Airtrap Removing AN Interlock Switch Rotate Switch Up Switch Holder Locking Tabs Removing the Drive Motor Pivot Stud Removing the TUB and Basket Assembly Align Tabs With Slots Support Weight While Removing Front Slot Front Holes Rear Half Of Tub Basket Front Half Of Tub Reassembly Notes Page Component Testing Water Level Setting Test PointsMotor & Switch Detergent DispenserTo test the door lock/unlock solenoids To test the door switchTo test the door lock main switches Drain Pump Motor Interference FilterTemperature Results Interlock Switch Electrostatic Discharge ESD Sensitive Electronics DiagnosticsDiagnostic Guide FAILURE/ERROR Display Codes Display Explanation and Recommended ProcedureLong Drain Motor Control Unit Error Dispenser Circuit Error CCU / Touchpad / LED Assembly Error Sud Test Program Control Diagnostic TestStarting the Test Mode Manually Unlocking Door Lock System Water Temperature SensorMotor Continuity Test To remove the touchpad/LED assembly To remove Central Control Unit CCUTo reassemble CCU To remove Motor Control Unit MCUTroubleshooting Chart ProblemDrum will Incorrect Page Wiring Diagram Page Product Specifications Warranty Information Sources United States