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

  • Door Switch for GMC GUN125-4B - Part B13708-18

    Misc. electrical/hardware diagram

    Door Switch

    Part #B13708-18

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

  • Rubber Sleev for GMC GUN125-4B - Part B18104-01

    Misc. electrical/hardware diagram

    Rubber Sleev

    Part #B18104-01

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

  • Blower Wheel for GMC GUN125-4B - Part B13680-46

    Blower assembly diagram

    Blower Wheel

    Part #B13680-46

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

  • Timed Fan for GMC GUN125-4B - Part B18099-03

    Misc. electrical/hardware diagram

    Timed Fan

    Part #B18099-03

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

  • Furnace Burner Flame Sensor for GMC GUN125-4B - Part B11726-05

    Gas train diagram

    Furnace Burner Flame Sensor

    Part #B11726-05

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

  • Flue Collect for GMC GUN125-4B - Part 18812-16

    Heat exchanger assembly diagram

    Flue Collect

    Part #18812-16

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

  • Burner Box T for GMC GUN125-4B - Part 18823-02

    Heat exchanger assembly diagram

    Burner Box T

    Part #18823-02

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

  • Vent/comb Ai for GMC GUN125-4B - Part B18105-07

    Misc. electrical/hardware diagram

    Vent/comb Ai

    Part #B18105-07

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

  • Blower Shell for GMC GUN125-4B - Part 14393-91

    Blower assembly diagram

    Blower Shell

    Part #14393-91

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

  • Secondary Ai for GMC GUN125-4B - Part 18224-08

    Heat exchanger assembly diagram

    Secondary Ai

    Part #18224-08

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

Symptoms for electric cooktops

Main causes: broken surface element, surface element switch failure, control system problem, surface element limiter swi…

Repair guides for electric cooktops

How to replace a coil surface element on an electric cooktop

How to replace a coil surface element on an electric cooktop

Easily replace a coil surface element in 15 minutes or less by following these step-by-step instructions.…

Repair time and Difficulty

 15 minutes or less
How to replace a radiant element on an electric cooktop

How to replace a radiant element on an electric cooktop

Follow these step-by-step instructions to replace a damaged radiant element on your electric cooktop when the element wo…

Repair time and Difficulty

 45 minutes or less
How to replace the glass top on an electric cooktop

How to replace the glass top on an electric cooktop

Don't use a cracked or damage glass cooktop—replace it, using these instructions to guide you.…

Repair time and Difficulty

 30 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