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Rheem
Furnace

Model # RGAA Official Rheem gas-fired highboy furnace

Here are the diagrams and repair parts for Official Rheem RGAA gas-fired highboy furnace, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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ALL PARTS
Showing 10 of 429 parts  |
Thermocouple 62-18443-05
#28

Functional replacement parts diagram

Thermocouple

Part #62-18443-05

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

Thermocouple 62-19635-01
#28A

Functional replacement parts diagram

Thermocouple

Part #62-19635-01

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

Capacitor 43-20847-03

#NI

All parts diagram

Capacitor

Part #43-20847-03

Replaced by #12005

?
Manufacturer substitution
This part replaces 43-20847-03. Substitute parts can look different from the original.
$16.12 | 
11% OFF Phone Price : $18.12
In Stock
Blower Wheel 70-18782-02

#NI

All parts diagram

Blower wheel

Part #70-18782-02

Replaced by #70-20602-01

?
Manufacturer substitution
This part replaces 70-18782-02. Substitute parts can look different from the original.
$126.40 | 
7% OFF Phone Price : $136.40
In Stock
F&l Control 47-18907-09
#20J

Functional replacement parts diagram

F&l control

Part #47-18907-09

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

Blow Cutoff AE-64401-07

#NI

All parts diagram

Blow cutoff

Part #AE-64401-07

$21.71
In Stock
Pilot 62-19125-01
#24

Functional replacement parts diagram

Pilot

Part #62-19125-01

$181.98
In Stock
Orifice 62-20509-47
#31F

Functional replacement parts diagram

Orifice

Part #62-20509-47

$63.91
In Stock
Orifice 62-20509-36
#31E

Functional replacement parts diagram

Orifice

Part #62-20509-36

$42.47
In Stock
Filter 54-19655-06
#18C

Functional replacement parts diagram

Filter

Part #54-19655-06

$23.74
In Stock

Symptoms for electric water heaters

Why does my water heater's heating element fail often?

Main causes: excessive tank sediment, high voltage supply…

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Why does the temperature of my hot water fluctuate?

Main causes: thermostats need adjustment, bad heating elements, faulty thermostats, tank sediment build-up, broken dip t…

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Repair guides for electric water heaters

How to replace a water heater element

How to replace a water heater element

If your water heater runs out of hot water quickly and one of the two heating elements has failed, replace the element f…

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Repair difficulty
Time required
 30 minutes or less
How to replace an electric water heater thermostat

How to replace an electric water heater thermostat

If the water temperature fluctuates or you don't get enough hot water, follow these instructions to replace your water h…

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Repair difficulty
Time required
 30 minutes or less
How to replace a water heater temperature and pressure (T&P) relief valve

How to replace a water heater temperature and pressure (T&P) relief valve

Replace a broken temperature/pressure (T&P) relief valve on an electric water heater using these instructions.…

Read more
Repair difficulty
Time required
 15 minutes or less

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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.…

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