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GMC GUPS120-4 gas furnace Parts
Here are the diagrams and repair parts for GMC GUPS120-4 gas furnace, as well as links to manuals and error code tables, if available.
By Schematic
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Browse Parts for GUPS120-4 Gas Furnace
Gas train diagram
Burner Assembly
Part #B18225-09
The manufacturer no longer makes this part, and there's no substitute part
Blower assembly diagram
Motor
Part #B13400-12
The manufacturer no longer makes this part, and there's no substitute part
Misc. electrical and hardware diagram
Furnace Air Pressure Switch
Part #B13701-26
The manufacturer no longer makes this part, and there's no substitute part
Heat exchanger assembly diagram
Flue Restrictor (gups1405)
Part #18248-28
The manufacturer no longer makes this part, and there's no substitute part
Misc. electrical and hardware diagram
Air Pressure Switch (gups0502, Gups1003, Gups1004, Gupi10503, Gupi1004, Gupi1005)
Part #B13701-01
The manufacturer no longer makes this part, and there's no substitute part
Blower assembly diagram
Motor
Part #B13400-14
The manufacturer no longer makes this part, and there's no substitute part
Heat exchanger assembly diagram
Heat Exch Su
Part #18212-10S
The manufacturer no longer makes this part, and there's no substitute part
Blower assembly diagram
Blower Shell
Part #14393-77
The manufacturer no longer makes this part, and there's no substitute part
Heat exchanger assembly diagram
Secondary Ai
Part #18224-16
The manufacturer no longer makes this part, and there's no substitute part
Blower assembly diagram
Blwr Asm,ser
Part #18682-04S
The manufacturer no longer makes this part, and there's no substitute part
Symptoms for upright freezers
Main causes: clogged or frozen defrost drain tube…
Repair guides for upright freezers
How to replace a freezer electronic control board
The electronic control board manages the compressor to control freezer temperature. Replace the control board using the…
Repair time and Difficulty
45 minutes or less
How to replace a freezer thermistor
When the thermistor can’t sense the freezer temperature, the freezer is colder or warmer than the set temperature. Follo…
Repair time and Difficulty
45 minutes or less
How to replace a freezer door switch
When the door switch fails, the freezer can’t detect that the door is closed. Follow the steps in this repair guide to r…
Repair time and Difficulty
15 minutes or less
Articles and videos for upright freezers
Find out how to stay safe when repairing your appliances.…
Get answers to frequently asked questions about Sears and Sears PartsDirect.…
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