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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.

There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • 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  |
Condenser Coil 210268

#NI

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Condenser coil

Part #210268

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

Blower Motor Relay 302020

#NI

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Blower motor relay

Part #302020

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

Pilot Assembly - Robertshaw 605024

#NI

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Pilot assembly - robertshaw

Part #605024

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

Combination Fan Limit Control 308051

#NI

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Combination fan limit control

Part #308051

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

Blower Wheel N/P

#NI

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Blower wheel

Part #N/P

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

Brass Orifce 522212

#NI

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Brass orifce

Part #522212

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

Blower Wheel 402082

#NI

All parts diagram

Blower wheel

Part #402082

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

Crankcase Heater UNAV

#NI

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Crankcase heater

Part #UNAV

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

Anit-short Cycle Timer 304017

#NI

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Anit-short cycle timer

Part #304017

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

Pilot Lighter Tube Orifice (nat.) 532908

#NI

All parts diagram

Pilot lighter tube orifice (nat.)

Part #532908

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.

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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 furnace burners won’t stay lit?

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

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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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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...

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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

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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