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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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RAD Rooftop Unit
#40C
Replacement parts diagram
Motor
Part #51-20760-01
Replaced by #WG840465
?
Manufacturer substitution
This part replaces 51-20760-01. Substitute parts can look different from the original.
$234.47
In Stock
#40A
Replacement parts diagram
Motor
Part #51-20681-01
Replaced by #WG840465
?
Manufacturer substitution
This part replaces 51-20681-01. Substitute parts can look different from the original.
$234.47
In Stock
#40D
Replacement parts diagram
Motor
Part #51-21185-01
Replaced by #WG840465
?
Manufacturer substitution
This part replaces 51-21185-01. Substitute parts can look different from the original.
$234.47
In Stock
#27A
Replacement parts diagram
Contactor
Part #42-20044-02
Replaced by #94-388
?
Manufacturer substitution
This part replaces 42-20044-02. Substitute parts can look different from the original.
$33.20 |
15% OFF Phone Price : $39.20
In Stock
#31B
Replacement 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.
$16.49 |
11% OFF Phone Price : $18.49
In Stock
#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.
$125.06
In Stock
#14A
Replacement parts diagram
Blower wheel
Part #70-18625-01
$195.52
In Stock
#14B
Replacement parts diagram
Blower wheel
Part #70-17426-02
$239.42
In Stock
#42A
Replacement parts diagram
Fan blade
Part #70-19895-01
$217.93
In Stock
#15A
Replacement parts diagram
Blow cutoff
Part #AE-64401-06
$24.11
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.
Thermostat problem, clogged air filter, burner failure…
Dirty air filter, clogged condenser coils, low refrigerant charge, faulty compressor…
Thermostat problems, bad compressor/condenser fan capacitor, lack of refrigerant, failed compressor…
Main causes: errant thermostat settings, lack of electrical power, clogged drain line, wiring failure, control failure.…
Main causes: Errant thermostat settings, lack of power, bad interlock switches, lack of exhaust ventilation, wiring fail…
Dirty flame sensor, failed flame sensor, damaged burner, bad high limit switch…
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.
![How to unclog the air conditioner drain line](https://images.ctfassets.net/fpe0ec7r30ix/5iUritfxpCd1DpIp1a877R/40282b19194988cab8bebdf37fbe2d85/Repair_Guide_Unclog_AC_drain.png?fm=png&w=270&h=270)
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…
Repair difficulty
Time required
15 minutes or less
![How to replace the furnace flame sensor](https://images.ctfassets.net/fpe0ec7r30ix/3eS1QwVKyAzKc3xcCxwWYf/e99aa372914592b7c54c76f99c533346/Replace_the_Furnace_Flame_Sensor_repair.png?fm=png&w=270&h=270)
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…
Repair difficulty
Time required
15 minutes or less
![How to replace a heating and air conditioning system thermostat](https://images.ctfassets.net/fpe0ec7r30ix/3MQglZSDOBmbdPINwbtouL/32abefb3320f3d2e7858bc4aa5fc8c69/HVACthermostatIntroImage.png?fm=png&w=270&h=270)
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.…
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.
![Maintaining your air conditioner](https://images.ctfassets.net/fpe0ec7r30ix/4fq1BfTNrQdQQwCIo0Fue4/e60c4e1970a820585ea1b8a3985ea52e/Maintaining_your_central_air_conditioner_image.png?fm=png&w=270&h=270)
Learn how to maintain your central air conditioner to keep it running smoothly all summer long.…
![How to enjoy all the online benefits we offer on our Sears PartsDirect website](https://images.ctfassets.net/fpe0ec7r30ix/1khJyw1eeQGvYKSbulrYWd/69493382c31bbf8d70b67fe7545f5e60/SPD_website_features.png?fm=png&w=270&h=270)
Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…
![Top questions about Sears and Sears PartsDirect](https://images.ctfassets.net/fpe0ec7r30ix/71r4g5Qhkmxm0giaIpcktG/e37c53ab5e6190ca17767b9872422fb8/Sears_PartsDirect_questions.png?fm=png&w=270&h=270)
Get answers to frequently asked questions about Sears and Sears PartsDirect.…