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Goettl
Heating & Cooling Combined Unit

Model # GA421-100A Official Goettl heating & cooling unit

Here are the diagrams and repair parts for Official Goettl GA421-100A heating & cooling unit, as well as links to manuals and error code tables, if available.

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  • 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”.

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

Model diagram and schematic

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ALL PARTS
Showing 10 of 47 parts  |
Fan Guard 406052

#NI

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Fan guard

Part #406052

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

Cntractor 301045

#NI

All parts diagram

Cntractor

Part #301045

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

Blower Motor 550085

#NI

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Blower motor

Part #550085

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

Transformer 315006

#NI

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Transformer

Part #315006

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

Pilot Assembly - Robertshaw 605025

#NI

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Pilot assembly - robertshaw

Part #605025

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

Gas Valve - Robertshaw 606024

#NI

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Gas valve - robertshaw

Part #606024

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

Gas Valve - Honeywell 606023

#NI

All parts diagram

Gas valve - honeywell

Part #606023

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

Wiring And Controls Assembly Comp. 533451

#NI

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Wiring and controls assembly comp.

Part #533451

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

Blower Assembly Complete 533446

#NI

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Blower assembly complete

Part #533446

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

Ignitor Wire - Honeywell 605017

#NI

All parts diagram

Ignitor wire - honeywell

Part #605017

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

Most common symptoms to help you fix your heating & cooling combined units

Choose a symptom to see related heating and air conditioning system repairs.

View all

Why is my furnace not blowing hot enough?

Thermostat problem, clogged air filter, burner failure…

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Why isn’t my air conditioner cooling well?

Dirty air filter, clogged condenser coils, low refrigerant charge, faulty compressor…

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Why isn’t my air conditioner cooling?

Thermostat problems, bad compressor/condenser fan capacitor, lack of refrigerant, failed compressor…

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Why won't my air conditioner turn on?

Main causes: errant thermostat settings, lack of electrical power, clogged drain line, wiring failure, control failure.…

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Why won't my furnace turn on?

Main causes: Errant thermostat settings, lack of power, bad interlock switches, lack of exhaust ventilation, wiring fail…

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Why won’t my furnace burners won’t stay lit?

Dirty flame sensor, failed flame sensor, damaged burner, bad high limit switch…

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Most common repair guides to help fix your heating & cooling combined units

These step-by-step repair guides will help you safely fix what’s broken on your HVAC system.

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How to unclog the air conditioner drain line

How to unclog the air conditioner drain line

The condensate drain line for your central air conditioner can clog with mold and mildew. Water will back up and start d…

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Repair difficulty
Time required
 15 minutes or less
How to replace the furnace flame sensor

How to replace the furnace flame sensor

The flame sensor detects when furnace burner flames are lit. You may need to replace the flame sensor if flames only sta…

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a heating and air conditioning system thermostat

How to replace a heating and air conditioning system thermostat

The control thermostat for your HVAC system can stop working. This repair guide shows how to replace it.…

Read more
Repair difficulty
Time required
 30 minutes or less

Effective articles & videos to help repair your heating & cooling combined units

Use the advice and tips in these articles and videos to get the most out of your HVAC system.

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Maintaining your air conditioner

Maintaining your air conditioner

Learn how to maintain your central air conditioner to keep it running smoothly all summer long.…

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How to enjoy all the online benefits we offer on our Sears PartsDirect website

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

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Top questions about Sears and Sears PartsDirect

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