Whirlpool
Central Air Conditioner

Model # ALF12420 Official Whirlpool air conditioner heat pump

Here are the diagrams and repair parts for Official Whirlpool ALF12420 air conditioner heat pump, 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 117 parts  |

Valve Kit 978030
#35I

Unit parts diagram

Valve kit

Part #978030

Replaced by #978030

?
Manufacturer substitution
This part replaces 978030. Substitute parts can look different from the original.
BEST SELLER
$40.49
33% OFF MSRP : $60.00
In Stock
Screw 487910
#16

Air flow and control parts diagram

Screw

Part #487910

Replaced by #WP488729

?
Manufacturer substitution
This part replaces 487910. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$4.39
19% OFF Phone Price : $5.39
In Stock
Cement 797403
#30C

Air flow and control parts diagram

Cement

Part #797403

Replaced by #WP279368

?
Manufacturer substitution
This part replaces 797403. Substitute parts can look different from the original.
BEST SELLER
$42.72
36% OFF MSRP : $67.00
In Stock
Valve Kit 978025
#35D

Unit parts diagram

Valve kit

Part #978025

Replaced by #WP978025

?
Manufacturer substitution
This part replaces 978025. Substitute parts can look different from the original.
$18.97
64% OFF MSRP : $53.00
In Stock
Valve Kit 978026
#35E

Unit parts diagram

Valve kit

Part #978026

Replaced by #978026

?
Manufacturer substitution
This part replaces 978026. Substitute parts can look different from the original.
$34.19
13% OFF Phone Price : $39.19
In Stock
Screw, 8 X 1 488480
Screw, 8 x 1

Part #488480

Replaced by #WP489069

?
Manufacturer substitution
This part replaces 488480. Substitute parts can look different from the original.
This item is not returnable
$4.39
19% OFF Phone Price : $5.39
In Stock
Capacitor 950030
#3

Air flow and control parts diagram

Capacitor

Part #950030

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

Refrigerant Access Valve, 5/8-in 978029
#35H

Unit parts diagram

Refrigerant access valve, 5/8-in

Part #978029

Replaced by #978029

?
Manufacturer substitution
This part replaces 978029. Substitute parts can look different from the original.
In Stock
Cable Tie 857547
#31

Unit parts diagram

Cable tie

Part #857547

Replaced by #WPW10339879

?
Manufacturer substitution
This part replaces 857547. Substitute parts can look different from the original.
This item is not returnable
$4.37
19% OFF Phone Price : $5.37
In Stock
Room Air Conditioner Outdoor Cover 484184
#35K

Unit parts diagram

Room air conditioner outdoor cover

Part #484184

$54.49
8% OFF Phone Price : $59.49
In Stock

Repair guides for bottom-mount refrigerators

How to replace a flipper mullion on a French-door refrigerator

How to replace a flipper mullion on a French-door refrigerator

If the flipper mullion breaks or its heater quits working, replace it in 15 minutes using these 4 easy steps.…

Repair difficulty
Time required
 15 minutes or less
How to replace a door gasket in a French-door refrigerator

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

The door gasket, often called a door seal, seals the gap around the door to keep the cold air in and the warm air out. R…

Repair difficulty
Time required
 15 minutes or less
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

Effective articles & videos to help repair your central air conditioners

Maintaining your air conditioner

Maintaining your air conditioner

Learn how to maintain your central air conditioner to keep it running smoothly all summer long.…

How to prevent the 2 most common AC failures from ruining your summer

How to prevent the 2 most common AC failures from ruining your summer

Get tips to help keep your central AC running all summer long…

Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…