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Carrier
Heating & Cooling Combined Unit

Model # 48SD042090300 Official Carrier package unit

Here are the diagrams and repair parts for Official Carrier 48SD042090300 package unit, as well as links to manuals and error code tables, if available.

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Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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Model diagram and schematic

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ALL PARTS
Showing 10 of 101 parts  |
Furnace Inducer Vent Motor Assembly 48GS400649
#NI

Front view/rear view diagram

Furnace inducer vent motor assembly

Part #48GS400649

$708.46 | 
$12.00 OFF Phone Price : $720.46
In Stock
Insulation 48SS500601
#NI

Front view/rear view diagram

Insulation

Part #48SS500601

$39.82
In Stock
Grommet KA56TR056
#NI

Front view/rear view diagram

Grommet

Part #KA56TR056

$25.31
In Stock
Evaporator Coil 50SZ400081
#NI

Front view/rear view diagram

Evaporator coil

Part #50SZ400081

$3343.81
In Stock
Circ Board LH33WP003
#NI

Front view/rear view diagram

Circ board

Part #LH33WP003

$495.60 | 
$12.00 OFF Phone Price : $507.60
In Stock
Transformer HT01BD209
#NI

Front view/rear view diagram

Transformer

Part #HT01BD209

$63.31
In Stock
Plate 50SS500879
#NI

Front view/rear view diagram

Plate

Part #50SS500879

$558.65
In Stock
Furnace Blower Fan Motor HC43AE233
#NI

Front view/rear view diagram

Furnace blower fan motor

Part #HC43AE233

$585.07 | 
$12.00 OFF Phone Price : $597.07
In Stock
Top, Evap 48GS400244
#NI

Front view/rear view diagram

Top, evap

Part #48GS400244

$427.15
In Stock
Scroll 48GS500242
#NI

Front view/rear view diagram

Scroll

Part #48GS500242

$233.73
In Stock

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 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

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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

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Repair difficulty
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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.…

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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

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