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Rheem
Furnace

Model # GNC Official Rheem gas-fired counterflow heating unit

Here are the diagrams and repair parts for Official Rheem GNC gas-fired counterflow heating 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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Showing 10 of 284 parts  |
Motor 51-20621-01

#NI

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Motor

Part #51-20621-01

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

Motor 51-18830-01

#NI

All parts diagram

Motor

Part #51-18830-01

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

Motor 51-19069-01

#NI

All parts diagram

Motor

Part #51-19069-01

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

Motor 51-19923-01

#NI

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Motor

Part #51-19923-01

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

Motor 51-20550-01

#NI

All parts diagram

Motor

Part #51-20550-01

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

Thermocouple 62-18443-05
#39A

Blower and heat exchange diagram

Thermocouple

Part #62-18443-05

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

Thermocouple 62-19635-01
#39B

Blower and heat exchange diagram

Thermocouple

Part #62-19635-01

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

Capacitor 43-20847-10

#NI

All parts diagram

Capacitor

Part #43-20847-10

Replaced by #12907

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Manufacturer substitution
This part replaces 43-20847-10. Substitute parts can look different from the original.
This item is not returnable
$4.87 | 
17% OFF Phone Price : $5.87
In Stock
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.
$16.49 | 
11% OFF Phone Price : $18.49
In Stock
Ign Control 62-21192-03
#42O

Blower and heat exchange diagram

Ign control

Part #62-21192-03

Replaced by #BG1600M51EF-1AA

?
Manufacturer substitution
This part replaces 62-21192-03. Substitute parts can look different from the original.
$191.94 | 
6% OFF Phone Price : $203.94
In Stock

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