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Air Handler

Model # A42-20 Official GMC air handler with coil

Here are the diagrams and repair parts for Official GMC A42-20 air handler with coil, as well as links to manuals and error code tables, if available.

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A42-20 Air Handler with Coil
Transformer B11416-43
#12

Air handler diagram

Transformer

Part #B11416-43

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

Heating Elem B10374-68
#7A

Air handler diagram

Heating elem

Part #B10374-68

Replaced by #B1037488S

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Manufacturer substitution
This part replaces B10374-68. Substitute parts can look different from the original.
$141.73 | 
8% OFF Phone Price : $153.73
In Stock
Motor 1/3 Hp B13400-312
#15A

Air handler diagram

Motor 1/3 hp

Part #B13400-312

Replaced by #B13400312S

?
Manufacturer substitution
This part replaces B13400-312. Substitute parts can look different from the original.
$371.59 | 
$12.00 OFF Phone Price : $383.59
In Stock
Sequencer A- B12565-52
#9A

Air handler diagram

Sequencer a-

Part #B12565-52

Replaced by #24A34-3

?
Manufacturer substitution
This part replaces B12565-52. Substitute parts can look different from the original.
$29.43 | 
17% OFF Phone Price : $35.43
In Stock
Blower Wheel B13680-36
#16

Air handler diagram

Blower wheel

Part #B13680-36

Replaced by #B1368036S

?
Manufacturer substitution
This part replaces B13680-36. Substitute parts can look different from the original.
$102.07 | 
11% OFF Phone Price : $114.07
In Stock
Heating Elem B10374-67
#7

Air handler diagram

Heating elem

Part #B10374-67

Replaced by #B1037485S

?
Manufacturer substitution
This part replaces B10374-67. Substitute parts can look different from the original.
$80.25 | 
7% OFF Phone Price : $86.25
In Stock
Heating Elem B10374-70
#7C

Air handler diagram

Heating elem

Part #B10374-70

Replaced by #B1037489S

?
Manufacturer substitution
This part replaces B10374-70. Substitute parts can look different from the original.
$213.29 | 
5% OFF Phone Price : $225.29
In Stock
Plastic Hori 17559-30
#23

Air handler diagram

Plastic hori

Part #17559-30

Replaced by #B1755930L

?
Manufacturer substitution
This part replaces 17559-30. Substitute parts can look different from the original.
$93.22
In Stock
Circuit Breaker B17535-10
#8

Air handler diagram

Circuit breaker

Part #B17535-10

Replaced by #CBK2PD240VC030S

?
Manufacturer substitution
This part replaces B17535-10. Substitute parts can look different from the original.
$96.82
In Stock
Sequencer B12565-51
#9

Air handler diagram

Sequencer

Part #B12565-51

Replaced by #B1256558

?
Manufacturer substitution
This part replaces B12565-51. Substitute parts can look different from the original.
$38.87
In Stock

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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