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Rheem
Heating & Cooling Combined Unit

Model # RRMA-A18 Official Rheem gas/electric package unit

Here are the diagrams and repair parts for Official Rheem RRMA-A18 gas/electric package 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 90 parts  |
Motor 51-23055-11

#46

All parts diagram

Motor

Part #51-23055-11

Replaced by #EM3465F

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Manufacturer substitution
This part replaces 51-23055-11. Substitute parts can look different from the original.
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$148.45 | 
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In Stock
Central Air Conditioner Start Capacitor (replaces U18-881) 43-17075-04

#NI05

All parts diagram

Central air conditioner start capacitor (replaces u18-881)

Part #43-17075-04

This item is not returnable
$28.38
In Stock
Gasket 68-23643-01

#39A

All parts diagram

Gasket

Part #68-23643-01

$11.91
In Stock
Drain Pipe AE-58611-01

#43

All parts diagram

Drain pipe

Part #AE-58611-01

$49.69
In Stock
Blower Housn AS-58619-01

#49

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Blower housn

Part #AS-58619-01

$233.18
In Stock
Grommet 56-23601-01

#42

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Grommet

Part #56-23601-01

$8.00
In Stock
Furnace Burner Flame Sensor 62-23543-02

#71

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Furnace burner flame sensor

Part #62-23543-02

$22.63
In Stock
Coil Condens AS-58677-02

#44

All parts diagram

Coil condens

Part #AS-58677-02

$2188.29
In Stock
Tp Insltn As AS-58607-07

#19

All parts diagram

Tp insltn as

Part #AS-58607-07

$249.84
In Stock
Coil Evapor AS-58627-91

#34B

All parts diagram

Coil evapor

Part #AS-58627-91

$1163.20
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.…

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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 prevent the 2 most common AC failures from ruining your summer

How to prevent the 2 most common AC failures from ruining your summer

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