Get free shipping on your order, with any water filter subscription. Find my filter

Open Hamburger Menu
Sears Parts Direct
Tips to find your model number
GMC GUN125-4B gas furnace

GMC GUN125-4B gas furnace Parts

Here are the diagrams and repair parts for GMC GUN125-4B gas furnace, as well as links to manuals and error code tables, if available.

By Schematic
SELECT DIAGRAM
?

This is the number corresponding to the part on the diagram / schematic

Browse Parts for GUN125-4B Gas Furnace

  • 5 Mfd 440/37 for GMC GUN125-4B - Part TRCF5

    Misc. electrical/hardware diagram

    Capacitor 5/

    Part #B9456-50

    Replaced by #TRCF5

    Info Icon
    Manufacturer substitution
    This part replaces B9456-50. Substitute parts can look different from the original.
    In Stock
    $29.15
    Minus Item
    Qty
    Plus Item
  • Transformer for GMC GUN125-4B - Part B11416-00

    Misc. electrical/hardware diagram

    Transformer

    Part #B11416-00

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

  • 1/6-1/2 Hp M for GMC GUN125-4B - Part 45460

    Blower assembly diagram

    Motor

    Part #B13400-09

    Replaced by #45460

    Info Icon
    Manufacturer substitution
    This part replaces B13400-09. Substitute parts can look different from the original.
    In Stock
    $280.82
    Minus Item
    Qty
    Plus Item
  • Central Air Conditioner Air Handler Blower Wheel for GMC GUN125-4B - Part B1368016S

    Blower assembly diagram

    Blower Wheel

    Part #B13680-16

    Replaced by #B1368016S

    Info Icon
    Manufacturer substitution
    This part replaces B13680-16. Substitute parts can look different from the original.
    In Stock
    $235.99
    Minus Item
    Qty
    Plus Item
  • Furnace Inducer Vent Motor Assembly for GMC GUN125-4B - Part B1859001S

    Misc. electrical/hardware diagram

  • Heat Exchange for GMC GUN125-4B - Part 0257F00067

    Heat exchanger assembly diagram

    Heat Exchange

    Part #18212-31S

    Replaced by #0257F00067

    Info Icon
    Manufacturer substitution
    This part replaces 18212-31S. Substitute parts can look different from the original.
    In Stock
    $836.76
    Minus Item
    Qty
    Plus Item
  • Furnace Blower Fan Wheel for GMC GUN125-4B - Part D6723306S

    Blower assembly diagram

    Blower Wheel

    Part #B13680-47

    Replaced by #D6723306S

    Info Icon
    Manufacturer substitution
    This part replaces B13680-47. Substitute parts can look different from the original.
    In Stock
    $150.10
    7% OFF Phone Price : $162.10Info Icon
    Minus Item
    Qty
    Plus Item
  • Furnace Temperature Limit Switch for GMC GUN125-4B - Part 1370906S

    Heat exchanger assembly diagram

    Limit, 150f,

    Part #B13700-06

    Replaced by #1370906S

    Info Icon
    Manufacturer substitution
    This part replaces B13700-06. Substitute parts can look different from the original.
    In Stock
    $108.62
    Minus Item
    Qty
    Plus Item
  • Furnace Blower Fan Motor Housing for GMC GUN125-4B - Part 0271A00016S

    Blower assembly diagram

    Blower Shell

    Part #18393-00

    Replaced by #0271A00016S

    Info Icon
    Manufacturer substitution
    This part replaces 18393-00. Substitute parts can look different from the original.
    In Stock
    $136.57
    8% OFF Phone Price : $148.57Info Icon
    Minus Item
    Qty
    Plus Item
  • Motor Run Capacitor for GMC GUN125-4B - Part 12910

    Blower assembly diagram

    Capacitor 15

    Part #B9456-53

    Replaced by #12910

    Info Icon
    Manufacturer substitution
    This part replaces B9456-53. Substitute parts can look different from the original.
    In Stock
    $7.95
    11% OFF Phone Price : $8.95Info Icon
    Minus Item
    Qty
    Plus Item

Symptoms for top-mount refrigerators

Main causes: frozen or clogged defrost drain tube, cracked water system tubing…

Repair guides for top-mount refrigerators

How to replace the light switch in a top-freezer refrigerator

How to replace the light switch in a top-freezer refrigerator

The light switch turns the refrigerator light on and off and monitors door position. Replace the light switch if it does…

Repair time and Difficulty

 15 minutes or less
How to replace the water inlet valve in a top-freezer refrigerator

How to replace the water inlet valve in a top-freezer refrigerator

The water inlet valve controls water flow to the ice maker. Replace the water valve if it doesn't open or shut properly.…

Repair time and Difficulty

 15 minutes or less
How to replace the compressor run capacitor in a top-freezer refrigerator

How to replace the compressor run capacitor in a top-freezer refrigerator

The run capacitor sends electric current to the compressor motor to help the motor run efficiently. Replace the run capa…

Repair time and Difficulty

 15 minutes or less

Effective articles & videos to help repair your furnaces

How to get your furnace ready for winter

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.…

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.…

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.…

Parts & More

Parts