Table of Contents
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Service
This manual is to be used by qualified appliance
technicians only. Maytag does not assume any
responsibility for property damage or personal
injury for improper service procedures done by
an unqualified person.
18 & 21
Cubic Foot
Top Mount
Refrigerators
This Base Manual covers general information
Refer to individual Technical Sheet
for information on specific models
This manual includes, but is
not limited to the following:
ATB1821AR*
ATB1830AR*
ATB1836AR*
ATB1838AE*
ATB1832AR*
ATB2130AR*
ATB2132AR*
ATB2136AR*
ATB2138AR*
ATF2136AR*
ATF2138AR*
CTB1821AR*
CTN1821AE*
CTL1821AE*
CTB2121AR*
CTF2126AR*
MTB1891AR*
MTB1893AR*
MTB1895AE*
MTB2193AR*
MTB2195AR*
MTF2193AR*
MTF2195AE*
16025860
Replaces 16023446
January 2005
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Chapters
Table of Contents
Troubleshooting
Related Manuals for Maytag MTB1891AR series
Summarization of Contents
Important Information
Servicer and Consumer Notices
Warnings and responsibilities for technicians and consumers regarding appliance service procedures.
Customer Support Center Contacts
Contact information for Maytag, Amana, and Jenn-Air customer service centers.
Safety Symbol and Label Recognition
Explanation of DANGER, WARNING, and CAUTION symbols and terms used in the manual.
Model Identification
Decoding Refrigerator Model Numbers
Explanation of the coding system in model numbers for brand, product type, capacity, and features.
Component Testing
Compressor Testing Procedures
Methods for testing compressor resistance, ground, and operation for fault diagnosis.
Capacitor and Condenser Testing
Steps to test capacitor resistance and detect condenser leaks using various methods.
Drier and Defrost Timer Testing
Procedures for testing the drier filter and the defrost timer's continuity and cycle operation.
Evaporator and Defrost Component Testing
Testing the evaporator for leaks, and the defrost heater and thermostat for proper function.
Service Procedures Part 1
Service Equipment and Drier Replacement
Lists necessary tools and steps for replacing the drier filter in HFC134a systems.
Refrigerant Handling and System Testing
Covers refrigerant precautions, line piercing valves, open lines, and compressor operational tests.
Dehydrating, Leak Testing, and Restrictions
Procedures for dehydrating the system, testing for leaks, and identifying restrictions.
Service Procedures Part 2
Evacuation and Refrigerant Charging
Detailed steps for evacuating the system and charging it with the correct refrigerant amount.
HFC134a Service Information and Safety
Guidelines for HFC134a refrigerant, health, safety, and property comparisons.
Compressor Replacement and Brazing
Instructions for replacing the compressor and proper brazing techniques for system connections.
Refrigerant Flow Diagram
Understanding the Refrigerant Circuit
Illustrates the path of refrigerant through the compressor, condenser, evaporator, and other components.
Cabinet Air Flow Diagram
Analyzing Air Circulation Patterns
Shows how air moves through the freezer and fresh food compartments for efficient cooling.
Troubleshooting Common Issues
Unit Operation and Temperature Problems
Addresses issues like unit not operating, running too long, or compartments being too warm or cold.
Noise, Ice, and Moisture Related Problems
Diagnoses common noises, frost/ice issues, and moisture condensation problems.
System Diagnosis
Interpreting System Pressure & Temperature Variations
Relates pressure and temperature variations to different system conditions like overcharge or shortage.
Symptoms of Refrigerant Overcharge and Shortage
Lists common signs indicating too much or insufficient refrigerant charge in the system.
Diagnosing Refrigerant Restrictions and Air Contamination
Explains how to identify and the causes of restrictions and air contamination in the system.
Ambient Temperature and Heat Load Effects
Explains how ambient temperatures and heat load impact refrigerator efficiency and pressures.
Disassembly Procedures
Door and Refrigerator Compartment Disassembly
Instructions for removing doors and components within the refrigerator compartment.
Freezer Compartment Component Removal
Steps for removing the Evaporator Cover, Fan, Heater, and Thermostat from the freezer.
Evaporator, Cabinet, and Machine Compartment Disassembly
Procedures for removing evaporator, rollers, drain pan, fan, compressor, and condenser.
Ice Maker Service Instructions
Ice Maker Specifications and Testing
Lists technical specs and outlines steps for testing the ice maker module using a voltmeter.
Ice Maker Disassembly and Water Fill Adjustment
Instructions for disassembling the ice maker and adjusting the water fill volume screw.
Troubleshooting Ice Maker Temperature, Water, and Fuse Issues
Addresses problems with temperature, water quality, bimetal thermostat, and thermal fuse.
Icemaker Troubleshooting Chart
Comprehensive guide to diagnosing and resolving common ice production issues like no ice, low ice, or overproduction.
Important Safety Instructions
General Safety Precautions and Symbols
Essential safety guidelines and recognition of DANGER, WARNING, and CAUTION symbols for appliance use.
Electrical Safety, Grounding, and Usage Practices
Covers safe electrical connections, grounding, and proper usage to prevent hazards.
Refrigerator Installation Procedures
Location, Leveling, and Base Grille Installation
Guidance on choosing a location, leveling the unit, and installing the front base grille.
Reversing Doors and Installing Handles
Step-by-step instructions for changing door swing direction and mounting door handles.
Connecting the Water Supply for Ice Maker
Guide on connecting the refrigerator to the household water supply for the ice maker.
Temperature Controls and Operation
Initial and Adjusted Temperature Settings
Recommendations for setting and adjusting fresh food and freezer temperature controls for optimal cooling.
Understanding Defrost and Cabinet Warmth
Explains the automatic defrost cycle and normal warm cabinet surface conditions.
Interior Compartment Features
Fresh Food Compartment Shelves and Crispers
Instructions for adjusting, removing, and reinstalling shelves and crisper drawers in the fresh food compartment.
Freezer Compartment Shelves and Baskets
Instructions for adjusting freezer shelves and removing/replacing slide-out or drop-down baskets.
Food Storage Tips
Fresh and Frozen Food Storage Guidelines
Recommended temperatures and tips for storing fresh foods to maintain quality and freshness.
Packaging and Loading Foods for Freezing
Tips on proper packaging, sealing, and loading foods into the freezer to prevent freezer burn.
Comprehensive Food Storage Chart
A detailed chart listing recommended storage times for various foods in refrigerator and freezer.
Refrigerator Storage, Moving, and Cleaning
Preparing for Vacations, Moving, and Light Replacement
Steps for preparing the refrigerator for non-use, relocation, and replacing the light bulb.
Refrigerator Cleaning Guidelines and Chart
Detailed guide on cleaning various parts of the refrigerator exterior and interior with tips.
Troubleshooting Normal Sounds and Issues
Identifying Normal Refrigerator Sounds
Explains common sounds like defrost timer clicks, refrigerant flow gurgles, and fan noises.
General Operation and Noise Troubleshooting
Addresses issues like unit not operating, running too long, or noisy operation.
Ice Maker and Moisture Troubleshooting
Diagnoses problems with automatic ice makers, ice production, and moisture condensation.
Warranty and Service Information
Understanding Refrigerator Warranty Coverage
Details the full one-year and limited five-year warranties for parts and labor.
Warranty Exclusions and Service Procedures
Lists issues not covered by warranty and how to contact service personnel.
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