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GMC GMN100-4 gas furnace

GMC GMN100-4 gas furnace Parts

Here are the diagrams and repair parts for GMC GMN100-4 gas furnace, as well as links to manuals and error code tables, if available.

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Browse Parts for GMN100-4 Gas Furnace

  • Switch Bracket for GMC GMN100-4 - Part 28095-00

    Heat assembly/electrical diagram

    Switch Bracket

    Part #28095-00

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

  • Furnace Burner Orifice for GMC GMN100-4 - Part B25893-45

    Heat assembly/electrical diagram

    Furnace Burner Orifice

    Part #B25893-45

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

  • Vnt Comb Kit for GMC GMN100-4 - Part B18105-11

    Vnt Comb Kit

    Part #B18105-11

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

  • Wire Harness for GMC GMN100-4 - Part 28684-01

    Heat assembly/electrical diagram

    Wire Harness

    Part #28684-01

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

  • Furnace Air Pressure Switch for GMC GMN100-4 - Part B13701-50

    Heat assembly/electrical diagram

    Furnace Air Pressure Switch

    Part #B13701-50

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

  • Flue Col Gsk for GMC GMN100-4 - Part B28325-02

    Heat assembly/electrical diagram

    Flue Col Gsk

    Part #B28325-02

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

  • Manifold, 5 Cell (model Gmn100-4) for GMC GMN100-4 - Part B25260-06

    Heat assembly/electrical diagram

    Manifold, 5 Cell (model Gmn100-4)

    Part #B25260-06

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

  • Control Moun for GMC GMN100-4 - Part 18158-12

    Heat assembly/electrical diagram

    Control Moun

    Part #18158-12

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

  • Cover for GMC GMN100-4 - Part 25155-00

    Heat exchanger diagram

    Cover

    Part #25155-00

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

  • Burner Box Bottom for GMC GMN100-4 - Part 28130-03

    Heat assembly/electrical diagram

    Burner Box Bottom

    Part #28130-03

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

Symptoms for electric water heaters

Main causes: thermostats need adjustment, bad heating elements, faulty thermostats, tank sediment build-up, broken dip t…

Main causes: excessive tank sediment, high voltage supply…

Repair guides for electric water heaters

How to replace a water heater element

How to replace a water heater element

If your water heater runs out of hot water quickly and one of the two heating elements has failed, replace the element f…

Repair time and Difficulty

 30 minutes or less
How to replace a water heater temperature and pressure (T&P) relief valve

How to replace a water heater temperature and pressure (T&P) relief valve

Replace a broken temperature/pressure (T&P) relief valve on an electric water heater using these instructions.…

Repair time and Difficulty

 15 minutes or less
How to replace an electric water heater thermostat

How to replace an electric water heater thermostat

If the water temperature fluctuates or you don't get enough hot water, follow these instructions to replace your water h…

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.…

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

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