Rheem
Furnace

Model # GWC Official Rheem gas-fired horizontal heating unit

Here are the diagrams and repair parts for Official Rheem GWC gas-fired horizontal heating unit, as well as links to manuals and error code tables, if available.

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

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Model diagram and schematic

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ALL PARTS
Showing 10 of 245 parts  |

Relay-plug 42-19423-01
#28

Replacement parts diagram

Relay-plug

Part #42-19423-01

Replaced by #WR90-370

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Manufacturer substitution
This part replaces 42-19423-01. Substitute parts can look different from the original.
$21.63
22% OFF Phone Price : $27.63
In Stock
Weatherking Blow Cutoff AE-64401-18

#NI

All parts diagram

Weatherking blow cutoff

Part #AE-64401-18

In Stock
Orifice 62-20003-47
#29B

Replacement parts diagram

Orifice

Part #62-20003-47

In Stock
Weatherking Blow Cutoff AE-64401-07

#NI

All parts diagram

Weatherking blow cutoff

Part #AE-64401-07

In Stock
Filter 54-17531-04

#NI

All parts diagram

Filter

Part #54-17531-04

In Stock
Orifice 62-20003-13
#29A

Replacement parts diagram

Orifice

Part #62-20003-13

In Stock
Blower Wheel 70-18631-01

#NI

All parts diagram

Blower wheel

Part #70-18631-01

In Stock
Gas Valve 60-21103-01
#33

Replacement parts diagram

Gas valve

Part #60-21103-01

In Stock
Orifice 62-20003-46
#29C

Replacement parts diagram

Orifice

Part #62-20003-46

In Stock
Blow Cutoff AE-64401-06

#NI

All parts diagram

Blow cutoff

Part #AE-64401-06

In Stock

Symptoms for gas walk-behind mowers

Choose a symptom to see related walk-behind mower repairs.

Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up...

Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade...

Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key...

Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel...

Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba...

Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent...

Repair guides for gas walk-behind mowers

These step-by-step repair guides will help you safely fix what’s broken on your walk-behind lawn mower.

How to rebuild a lawn mower carburetor

How to rebuild a lawn mower carburetor

The carburetor mixes air with fuel to drive the piston. Rebuild the carburetor if it's clogged or leaks....

Repair difficulty
Time required
60 minutes or less
How to replace a lawn mower recoil starter on an OHV engine

How to replace a lawn mower recoil starter on an OHV engine

Replace the recoil starter if it doesn't move when you pull the starter rope....

Repair difficulty
Time required
15 minutes or less
How to replace a lawn mower wheel

How to replace a lawn mower wheel

Learn how replace a damaged wheel on a walk-behind lawn mower—it's a quick, easy fix....

Repair difficulty
Time required
15 minutes or less

Effective articles & videos to help repair your furnaces

Use the advice and tips in these articles and videos to get the most out of your walk-behind lawn mower.

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....

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....

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....