Janitrol
Furnace

Model #GUPX050-3B Official Janitrol gas furnace

Here are the diagrams and repair parts for Janitrol GUPX050-3B gas furnace, as well as links to manuals and error code tables, if available.

There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

For DIY troubleshooting advice and repair guides, visit our repair help section.

Search within this model
Parts List

Showing 10 of 59 parts

Motor Run Capacitor#1A

Blower assembly Diagram

Capacitor 10

Part #B9456-52
Replaced by #12908
?
Manufacturer substitution
This part replaces B9456-52. Substitute parts can look different from the original.
This item is not returnable
In Stock
$5.26 | 
16% OFF 
Phone Price: $6.26
Furnace Door Switch (replaces B1370818, B13708-18)#4

Misc. electrical and hardware Diagram

Door switch

Part #B13708-18
Replaced by #0130M00243
?
Manufacturer substitution
This part replaces B13708-18. Substitute parts can look different from the original.
This item is not returnable
In Stock
$5.30 | 
16% OFF 
Phone Price: $6.30
Gas Valve#1

Gas train Diagram

Gas valve

Part #12826-06S

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

Motor#2A

Blower assembly Diagram

Motor

Part #B13400-09

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

Secondary Ai#5C

Heat exchanger assembly Diagram

Secondary ai

Part #18224-19
This item is not returnable
In Stock
$3.49
Flue Restric#6B

Heat exchanger assembly Diagram

Flue restric

Part #18248-19
This item is not returnable
In Stock
$3.49
Power Vent H#7

Heat exchanger assembly Diagram

Power vent h

Part #18812-04
In Stock
$14.99
Secondary Ai#5B

Heat exchanger assembly Diagram

Secondary ai

Part #18224-18
This item is not returnable
In Stock
$2.99
Flue Restric#6C

Heat exchanger assembly Diagram

Flue restric

Part #18248-18
This item is not returnable
In Stock
$3.49
Furnace Air Pressure Switch#3B

Misc. electrical and hardware Diagram

In Stock
$56.09

Articles and videos common to all furnaces

November 30, 2022

2023 HVAC regulation changes and how they may affect you

2023 HVAC regulation changes and how they may affect you

Find out how new DOE standards going into effect in 2023 can affect you and what you need to do.

August 05, 2022

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

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

Learn about Sears Technical Institute and the advanced technical content being developed for aspiring appliance techs.

June 29, 2022

Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.