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Thermal Zone
Air Handler

Model # AH42B-1 Official Thermal Zone air handler

Here are the diagrams and repair parts for Official Thermal Zone AH42B-1 air handler, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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Showing 10 of 15 parts  |
Capacitor 621435
#8

Air handlers diagram

Capacitor

Part #621435

Replaced by #12908

?
Manufacturer substitution
This part replaces 621435. Substitute parts can look different from the original.
This item is not returnable
$5.26 | 
16% OFF Phone Price : $6.26
In Stock
Blower Wheel 667037
#7

Air handlers diagram

Blower wheel

Part #667037

The manufacturer no longer makes this part, and there's no substitute part

Thermal Zone Blower Motor 913358
#9

Air handlers diagram

Thermal zone blower motor

Part #913358

The manufacturer no longer makes this part, and there's no substitute part

Indoor Coil Assembly 914402
#13

Air handlers diagram

Indoor coil assembly

Part #914402

The manufacturer no longer makes this part, and there's no substitute part

Lower Door With Insulation 499871Z
#12

Air handlers diagram

Lower door with insulation

Part #499871Z

The manufacturer no longer makes this part, and there's no substitute part

Electrical Panel Assembly 470720
#2

Air handlers diagram

Electrical panel assembly

Part #470720

The manufacturer no longer makes this part, and there's no substitute part

Transformer 620858
#4

Air handlers diagram

Transformer

Part #620858

The manufacturer no longer makes this part, and there's no substitute part

Close Off Plate (2) 226420
#5

Air handlers diagram

Close off plate (2)

Part #226420

The manufacturer no longer makes this part, and there's no substitute part

Horizontal Drain Pan Assembly (not Shown) 914729
#16

Air handlers diagram

Horizontal drain pan assembly (not shown)

Part #914729

The manufacturer no longer makes this part, and there's no substitute part

Cap, Top With Insulation 372101Z
#1

Air handlers diagram

Cap, top with insulation

Part #372101Z

The manufacturer no longer makes this part, and there's no substitute part

Repair guides for bottom-mount refrigerators

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How to replace a door gasket in a French-door refrigerator

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How to replace a refrigerator defrost control assembly

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Repair difficulty
Time required
 120 minutes or less

Effective articles & videos to help repair your air handlers

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Introducing new technical repair content that we’re developing for the Sears Technical Institute

Introducing new technical repair content that we’re developing for the Sears Technical Institute

Learn about Sears Technical Institute and the advanced technical content being developed for aspiring appliance techs.…

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