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Rheem
Furnace

Model # GUC Official Rheem gas-fired horizontal heating unit

Here are the diagrams and repair parts for Official Rheem GUC gas-fired horizontal 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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ALL PARTS
Showing 10 of 245 parts  |
Relay-plug 42-19423-01
#28

Replacement parts diagram

Relay-plug

Part #42-19423-01

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

Orifice 62-20003-47
#29B

Replacement parts diagram

Orifice

Part #62-20003-47

$27.69
In Stock
Weatherking Blow Cutoff AE-64401-07

#NI

All parts diagram

Weatherking blow cutoff

Part #AE-64401-07

$21.71
In Stock
Filter 54-17531-04

#NI

All parts diagram

Filter

Part #54-17531-04

$23.98
In Stock
Pilot 62-19125-01
#30A

Replacement parts diagram

Pilot

Part #62-19125-01

$181.98
In Stock
Orifice 62-20003-13
#29A

Replacement parts diagram

Orifice

Part #62-20003-13

$25.56
In Stock
Orifice 62-20003-46
#29C

Replacement parts diagram

Orifice

Part #62-20003-46

$27.69
In Stock
Blower Wheel 70-18631-01

#NI

All parts diagram

Blower wheel

Part #70-18631-01

$191.76
In Stock
Weatherking Blow Cutoff AE-64401-18

#NI

All parts diagram

Weatherking blow cutoff

Part #AE-64401-18

$23.58
In Stock
Blow Cutoff AE-64401-06

#NI

All parts diagram

Blow cutoff

Part #AE-64401-06

$24.11
In Stock

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Repair guides for gas walk-behind mowers

These step-by-step repair guides will help you safely fix what’s broken on your walk-behind lawn mower.

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How to replace a lawn mower spark plug

Take a few minutes to replace the spark plug during your lawn mower's annual tune-up or if the spark plug is burnt or cr…

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Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower drive cable

How to replace a lawn mower drive cable

The drive cable engages the transmission to spin the drive wheels and move the mower across the grass. Replace the drive…

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Repair difficulty
Time required
 60 minutes or less
How to replace a lawn mower starter rope

How to replace a lawn mower starter rope

These step-by-step instructions show how to replace a broken starter pull rope on a walk-behind lawn mower.…

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Repair difficulty
Time required
 30 minutes or less

Effective articles & videos to help repair your furnaces

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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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Introducing new technical repair content that we’re developing for the Sears Technical Institute

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