Can’t find your part?   Contact us:
+1-309-603-4777
Sears Parts Direct
Orders

  • Keep track of the models you own in your profile

    Sign in or Register to view or add models

Schedule a repair
Rheem
Furnace

Model # HWA8&12 Official Rheem hot water space heat furnace

Here are the diagrams and repair parts for Official Rheem HWA812 hot water space heat furnace, 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 47 parts  |
Transformer 46-18788-83
#12

Unit parts diagram

Transformer

Part #46-18788-83

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

Capacitor 43-20847-04
#21

Unit parts diagram

Capacitor

Part #43-20847-04

Replaced by #12005

?
Manufacturer substitution
This part replaces 43-20847-04. Substitute parts can look different from the original.
$16.12 | 
11% OFF Phone Price : $18.12
In Stock
Furnace Coil Assembly AS-58227-02
#8A

Unit parts diagram

Furnace coil assembly

Part #AS-58227-02

$1225.88
In Stock
Motor 51-20169-02
#20

Unit parts diagram

Motor

Part #51-20169-02

$353.51
In Stock
Filter 54-19655-12

#NI

All parts diagram

Filter

Part #54-19655-12

$22.71
In Stock
Blower Wheel 70-18631-01
#17

Unit parts diagram

Blower wheel

Part #70-18631-01

$191.76
In Stock
Coil Assembly AS-58228-02
#8B

Unit parts diagram

Coil assembly

Part #AS-58228-02

$1545.45
In Stock
Mount Bracket AS-53148-01
#19B

Unit parts diagram

Mount bracket

Part #AS-53148-01

Replaced by #AS-53148-81

?
Manufacturer substitution
This part replaces AS-53148-01. Substitute parts can look different from the original.
$108.10
In Stock
Vnt Mtr Rely 42-22444-03
#13

Unit parts diagram

Vnt mtr rely

Part #42-22444-03

Replaced by #WR90-370

?
Manufacturer substitution
This part replaces 42-22444-03. Substitute parts can look different from the original.
$21.63 | 
19% OFF Phone Price : $26.63
In Stock
Blower Wheel 70-21476-01
#17A

Unit parts diagram

Blower wheel

Part #70-21476-01

Replaced by #70-23111-05

?
Manufacturer substitution
This part replaces 70-21476-01. Substitute parts can look different from the original.
$143.04
In Stock

Symptoms for electric ranges

Why doesn't my electric range's surface element heat properly?

Main causes: faulty surface element, burner control switch failure, temperature limiter not working properly, loose wiri…

Read more

Should I replace a damaged glass cooktop?

Main causes: impact from dropping an item on the glass surface, ceramic glass surface flaw, surface element temperature …

Read more

Repair guides for electric ranges

How to replace a range hidden bake element

How to replace a range hidden bake element

These step-by-step instructions guide you through replacing the oven hidden bake element in an electric range.…

Read more
Repair difficulty
Time required
 30 minutes or less
How to replace an electric range oven door outer glass panel

How to replace an electric range oven door outer glass panel

Learn how to replace a damaged outer window panel on your oven door with these step-by-step instructions. …

Read more
Repair difficulty
Time required
 45 minutes or less
How to replace a range glass cooktop

How to replace a range glass cooktop

These step-by-step instructions explain how to replace a damaged ceramic glass cooktop on an electric range. …

Read more
Repair difficulty
Time required
 45 minutes or less

Effective articles & videos to help repair your furnaces

View all
How to get your furnace ready for winter

How to get your furnace ready for winter

Get expert tips for preparing your furnace for winter. Follow maintenance tips to keep your furnace in top shape.…

Read more
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.…

Read more
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.…

Read more

Parts & More