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Carrier
Heating & Cooling Combined Unit

Model # 48SDN042090300 Official Carrier package unit

Here are the diagrams and repair parts for Official Carrier 48SDN042090300 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 103 parts  |
Furnace Inducer Vent Motor Assembly 48GS400649
#NI

Cabinet parts diagram

Furnace inducer vent motor assembly

Part #48GS400649

$708.46 | 
$12.00 OFF Phone Price : $720.46
In Stock
Side Panel 48GS500236
#37

Cabinet parts diagram

Side panel

Part #48GS500236

$299.40
In Stock
Panel 48GS500235
#20

Cabinet parts diagram

Panel

Part #48GS500235

$293.29
In Stock
Insulation 48GS500302
#NI

Cabinet parts diagram

Insulation

Part #48GS500302

$103.78
In Stock
Furnace Heat Exchanger Cover 48GS400108
#NI

Cabinet parts diagram

Furnace heat exchanger cover

Part #48GS400108

$325.53 | 
$12.00 OFF Phone Price : $337.53
In Stock
Fan Plate 48GS500240
#NI

Cabinet parts diagram

Fan plate

Part #48GS500240

$198.18
In Stock
Cover Assembly 48GS400552
#NI

Cabinet parts diagram

Cover assembly

Part #48GS400552

$267.15
In Stock
Valve,serv EC39EZ065
#NI

Cabinet parts diagram

Valve,serv

Part #EC39EZ065

$9.11
In Stock
Plate Assembly 48GS400310
#NI

Cabinet parts diagram

Plate assembly

Part #48GS400310

$288.69
In Stock
Grommet KA56TR057
#NI

Cabinet parts diagram

Grommet

Part #KA56TR057

This item is not returnable
$4.89
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

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.…

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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

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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