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Rheem
Heating & Cooling Combined Unit

Model # RAD Official Rheem rooftop unit

Here are the diagrams and repair parts for Official Rheem RAD rooftop unit, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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Showing 10 of 255 parts  |
Motor 51-21242-01
#13A

Replacement parts diagram

Motor

Part #51-21242-01

Replaced by #45461

?
Manufacturer substitution
This part replaces 51-21242-01. Substitute parts can look different from the original.
BEST SELLER
$207.04
In Stock
Motor 51-20908-01
#13B

Replacement parts diagram

Motor

Part #51-20908-01

Replaced by #45461

?
Manufacturer substitution
This part replaces 51-20908-01. Substitute parts can look different from the original.
BEST SELLER
$207.04
In Stock
Motor 51-20918-01
#13D

Replacement parts diagram

Motor

Part #51-20918-01

Replaced by #45461

?
Manufacturer substitution
This part replaces 51-20918-01. Substitute parts can look different from the original.
BEST SELLER
$207.04
In Stock
Fan Blade 70-20838-01
#42B

Replacement parts diagram

Fan blade

Part #70-20838-01

Replaced by #70-21859-05

?
Manufacturer substitution
This part replaces 70-20838-01. Substitute parts can look different from the original.
$91.20
In Stock
Blower Wheel 70-17426-02
#14B

Replacement parts diagram

Blower wheel

Part #70-17426-02

$239.42
In Stock
Blower Wheel 70-18625-01
#14A

Replacement parts diagram

Blower wheel

Part #70-18625-01

$195.52
In Stock
Fan Blade 70-19895-01
#42A

Replacement parts diagram

Fan blade

Part #70-19895-01

$217.93
In Stock
Blow Cutoff AE-64401-06
#15A

Replacement parts diagram

Blow cutoff

Part #AE-64401-06

$24.11
In Stock
Central Air Conditioner Condenser Fan Blade 70-19897-01
#42D

Replacement parts diagram

Central air conditioner condenser fan blade

Part #70-19897-01

$100.76
In Stock
Transformer 46-18788-01
#28A

Replacement parts diagram

Transformer

Part #46-18788-01

Replaced by #90-4031F

?
Manufacturer substitution
This part replaces 46-18788-01. Substitute parts can look different from the original.
$10.99
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 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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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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Most common repair guides to help fix your heating & cooling combined units

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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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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.…

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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

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

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