Maytag MFI2266AES Service Manual - Page 26

In Sabbath mode.

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Troubleshooting Chart ! WARNING To avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit, unless test procedures require power to be connected. Discharge capacitor through a resistor before attempting to service. Ensure all ground wires are connected before certifying unit as repaired and/or operational. S ym p to m Frost or ice on evaporator U nit starts and stops frequently (cycles on and off) N o Interior lights, and appliance is still running. Possible Causes D efrost therm ostat faulty Evaporator fan faulty D efrost heater rem ains open Defrost control faulty O pen wire or connector R efrigerant shortage or restriction Loose w ire connections Supply voltage out of specification O verload protector open Faulty com pressor m otor capacitor (som e com pressors do not require m otor capacitor) Faulty fan m otor R estricted air flow R efrigerant shortage or restriction In Sabbath m ode. Door has been left open for 10 continuous m inutes. O pen circuit on neutral side of light c ir c u it. Corrective Action Check defrost therm ostat. R eplace if fa ile d . C heck fan m otor. R eplace if failed. C heck defrost heater continuity. R eplace if failed. C heck m ain control and replace if fa ile d . C heck w iring and connections. R epair as necessary. C heck for leak or restriction. R epair, evacuate and recharge system . C heck w iring and connections. R epair as necessary. Check input voltage. C orrect any supply problem s. Check overload protector for continuity. If open, rep lace overload. NOTE: Ensure overload/com pressor are below trip tem perature before testing. C heck capacitor for open/short. R eplace if necessary. N O TE: D ischarge capacitor before testing. C heck fan m otor. R eplace if failed. C heck condenser and grille for dirt. C le a n . C heck for leak or restriction. R epair, evacuate and recharge system . If D ispenser lights are also off, see Sabbath m ode. Close all three doors for at least one second to reset control. O pen circuit (w iring or m ain control board) from neutral to light sockets. 26 16026312 ©2006 Maytag Services

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26
16026312
©2006 Maytag Services
Symptom
Possible Causes
Corrective Action
Defrost thermostat faulty
Check defrost thermostat. Replace if
failed.
Evaporator fan faulty
Check fan motor. Replace if failed.
Defrost heater remains open
Check defrost heater continuity.
Replace if failed.
Defrost control faulty
Check main control and replace if
failed.
Open wire or connector
Check wiring and connections.
Repair as necessary.
Frost or ice on evaporator
Refrigerant shortage or restriction
Check for leak or restriction. Repair,
evacuate and recharge system.
Loose wire connections
Check wiring and connections.
Repair as necessary.
Supply voltage out of specification
Check input voltage. Correct any
supply problems.
Overload protector open
Check overload protector for
continuity. If open, replace overload.
NOTE:
Ensure
overload/compressor are below
trip temperature before testing.
Faulty compressor motor capacitor
(some compressors do not require
motor capacitor)
Check capacitor for open/short.
Replace if necessary.
NOTE:
Discharge capacitor
before testing.
Faulty fan motor
Check fan motor. Replace if failed.
Restricted air flow
Check condenser and grille for dirt.
Clean.
Unit starts and stops frequently
(cycles on and off)
Refrigerant shortage or restriction
Check for leak or restriction. Repair,
evacuate and recharge system.
In Sabbath mode.
If Dispenser lights are also off, see
Sabbath mode.
Door has been left open for 10
continuous minutes.
Close all three doors for at least one
second to reset control.
No Interior lights, and appliance is
still running.
Open circuit on neutral side of light
circuit.
Open circuit (wiring or main control
board) from neutral to light sockets.
Troubleshooting Chart
To avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit, unless test
procedures require power to be connected. Discharge capacitor through a resistor before attempting to service.
Ensure all ground wires are connected before certifying unit as repaired and/or operational.
!
WARNING