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Rheem
Heating & Cooling Combined Unit

Model # RGE Official Rheem rooftop unit

Here are the diagrams and repair parts for Official Rheem RGE rooftop unit, 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:

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  • 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”.

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

Model diagram and schematic

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ALL PARTS
Showing 10 of 281 parts  |
Motor 51-20679-11
Motor

Part #51-20679-11

Replaced by #WG840465

?
Manufacturer substitution
This part replaces 51-20679-11. Substitute parts can look different from the original.
BEST SELLER
$150.11
In Stock
Motor 51-21185-11
Motor

Part #51-21185-11

Replaced by #WG840465

?
Manufacturer substitution
This part replaces 51-21185-11. Substitute parts can look different from the original.
BEST SELLER
$150.11
In Stock
Motor 51-20900-01
Motor

Part #51-20900-01

Replaced by #45461

?
Manufacturer substitution
This part replaces 51-20900-01. Substitute parts can look different from the original.
BEST SELLER
$207.04
In Stock
Relay 42-19423-03
Relay

Part #42-19423-03

Replaced by #WR90-370

?
Manufacturer substitution
This part replaces 42-19423-03. Substitute parts can look different from the original.
$21.63
| 
22% OFF Phone Price : $27.63
In Stock
Relay-plug 42-19423-01
Relay-plug

Part #42-19423-01

Replaced by #WR90-370

?
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
Central Air Conditioner Start Capacitor (replaces U18-881) 43-17075-04

#NI

All parts diagram

Central air conditioner start capacitor (replaces u18-881)

Part #43-17075-04

This item is not returnable
$28.38
In Stock
Fan Blade 70-20623-01
#25A

Replacement parts diagram

Fan blade

Part #70-20623-01

Replaced by #70-21859-05

?
Manufacturer substitution
This part replaces 70-20623-01. Substitute parts can look different from the original.
$91.20
In Stock
Weatherking Blow Cutoff AE-64401-18
Weatherking blow cutoff

Part #AE-64401-18

$23.58
In Stock
Rheem Furnace Intermittent Pilot Ignition Control Module 62-21747-02

#NI

All parts diagram

Rheem furnace intermittent pilot ignition control module

Part #62-21747-02

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

Furnace Inducer Vent Motor Assembly 51-21964-11
Furnace inducer vent motor assembly

Part #51-21964-11

$313.75
| 
$12.00 OFF Phone Price : $325.75
In Stock

Most common symptoms to help you fix your heating & cooling combined units

Choose a symptom to see related heating and air conditioning system repairs.

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Why is my furnace not blowing hot enough?

Thermostat problem, clogged air filter, burner failure...

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Why isn’t my air conditioner cooling well?

Dirty air filter, clogged condenser coils, low refrigerant charge, faulty compressor...

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Why isn’t my air conditioner cooling?

Thermostat problems, bad compressor/condenser fan capacitor, lack of refrigerant, failed compressor...

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Why won’t my furnace burners won’t stay lit?

Dirty flame sensor, failed flame sensor, damaged burner, bad high limit switch...

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Why won't my air conditioner turn on?

Main causes: errant thermostat settings, lack of electrical power, clogged drain line, wiring failure, control failure....

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Why won't my furnace turn on?

Main causes: Errant thermostat settings, lack of power, bad interlock switches, lack of exhaust ventilation, wiring fail...

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Most common repair guides to help fix your heating & cooling combined units

These step-by-step repair guides will help you safely fix what’s broken on your HVAC system.

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How to unclog the air conditioner drain line

How to unclog the air conditioner drain line

The condensate drain line for your central air conditioner can clog with mold and mildew. Water will back up and start d...

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Repair difficulty
Time required
15 minutes or less
How to replace the furnace flame sensor

How to replace the furnace flame sensor

The flame sensor detects when furnace burner flames are lit. You may need to replace the flame sensor if flames only sta...

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Repair difficulty
Time required
15 minutes or less
How to replace a heating and air conditioning system thermostat

How to replace a heating and air conditioning system thermostat

The control thermostat for your HVAC system can stop working. This repair guide shows how to replace it....

Read more
Repair difficulty
Time required
30 minutes or less

Effective articles & videos to help repair your heating & cooling combined units

Use the advice and tips in these articles and videos to get the most out of your HVAC system.

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Maintaining your air conditioner

Maintaining your air conditioner

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

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How to enjoy all the online benefits we offer on our Sears PartsDirect website

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier....

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Top questions about Sears and Sears PartsDirect

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

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