Maytag MTB1504ARW Operations Instructions download pdf (Page 22)

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

Fusible link

Check defrost heater continuity.

Replace if failed

Defrost control faulty Check 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 or thermostat

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.

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

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Maytag MTB1504ARW Operations Instructions Page 22

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