GMC
Air Handler

Model # A18-05C Official GMC air handler with coil

Here are the diagrams and repair parts for Official GMC A18-05C air handler with coil, as well as links to manuals and error code tables, if available.

There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

For DIY troubleshooting advice and repair guides, visit our repair help section.

Model diagram and schematic

SEARCH WITHIN THIS MODEL

?

This is the number corresponding to the part on the diagram / schematic

Search
ALL PARTS
Showing 10 of 43 parts  |

Furnace Heating Element Assembly (replaces B10374-85) B1037485S
#71C

Air handler with coil diagram

Furnace heating element assembly (replaces b10374-85)

Part #B1037485S

$80.25
7% OFF Phone Price : $86.25
In Stock
Furnace Heating Element Assembly (replaces B1037488, B10374-88) B1037488S
#71

Air handler with coil diagram

Furnace heating element assembly (replaces b1037488, b10374-88)

Part #B1037488S

$141.73
8% OFF Phone Price : $153.73
In Stock
Central Air Conditioner Air Handler Blower Motor B13400313S
#131A

Air handler with coil diagram

Central air conditioner air handler blower motor

Part #B13400313S

$311.70
$12.00 OFF Phone Price : $323.70
In Stock
Sequencer B1256552
#91B

Air handler with coil diagram

Sequencer

Part #B1256552

Replaced by #B1256559

?
Manufacturer substitution
This part replaces B1256552. Substitute parts can look different from the original.
$42.00
13% OFF Phone Price : $48.00
In Stock
Capacitor CAP050000370VAS
#161

Air handler with coil diagram

Capacitor

Part #CAP050000370VAS

Replaced by #CAP050000370VAP

?
Manufacturer substitution
This part replaces CAP050000370VAS. Substitute parts can look different from the original.
$32.10
16% OFF Phone Price : $38.10
In Stock
Goodman Flowrator W/copper Stub Assy. B1313668
#181B

Air handler with coil diagram

Goodman flowrator w/copper stub assy.

Part #B1313668

In Stock
Central Air Conditioner Air Handler Heater B1037487S
#71D

Air handler with coil diagram

Central air conditioner air handler heater

Part #B1037487S

$123.72
9% OFF Phone Price : $135.72
In Stock
Goodman Heat Element (single Pack) B1037480S
#71B

Air handler with coil diagram

Goodman heat element (single pack)

Part #B1037480S

In Stock
Flowrator B1314452
#181

Air handler with coil diagram

Flowrator

Part #B1314452

In Stock
Filter Cover A/h Sml 1722040
#221

Air handler with coil diagram

Filter cover a/h sml

Part #1722040

This item is not returnable
In Stock

Symptoms for top-mount refrigerators

Main causes: frozen or clogged defrost drain tube, cracked water system tubing…

Repair guides for top-mount refrigerators

How to replace a refrigerator water valve

How to replace a refrigerator water valve

Replace the water valve that feeds water to the ice maker and water dispenser if it no longer controls the flow of water…

Repair difficulty
Time required
 15 minutes or less
How to replace the compressor run capacitor in a top-freezer refrigerator

How to replace the compressor run capacitor in a top-freezer refrigerator

The run capacitor sends electric current to the compressor motor to help the motor run efficiently. Replace the run capa…

Repair difficulty
Time required
 15 minutes or less
How to replace the defrost thermistor in a top-freezer refrigerator

How to replace the defrost thermistor in a top-freezer refrigerator

The defrost thermistor attaches to the evaporator coil and measures the evaporator coil temperature during defrost.…

Repair difficulty
Time required
 15 minutes or less

Effective articles & videos to help repair your air handlers

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.…