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Carrier
Heating & Cooling Combined Unit

Model # 48SD030040300 Official Carrier package unit

Here are the diagrams and repair parts for Official Carrier 48SD030040300 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 98 parts  |
Contactor HN51KB024
#NI

Front view/rear view diagram

Contactor

Part #HN51KB024

Replaced by #90-244

?
Manufacturer substitution
This part replaces HN51KB024. Substitute parts can look different from the original.
BEST SELLER
$26.61 | 
18% OFF Phone Price : $32.61
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
Temp Swtch HH18HA211
#NI

Front view/rear view diagram

Temp swtch

Part #HH18HA211

$25.71
In Stock
Furnace Heat Exchanger Cover 48GS400108
#NI

Front view/rear view diagram

Furnace heat exchanger cover

Part #48GS400108

$325.53 | 
$12.00 OFF Phone Price : $337.53
In Stock
Furnace Burner 50DK407030
#NI

Front view/rear view diagram

Furnace burner

Part #50DK407030

$39.89
In Stock
Condenser Coil 50SD400059
#100

Front view/rear view diagram

Condenser coil

Part #50SD400059

$1937.35
In Stock
Grommet KA56DS001
#NI

Front view/rear view diagram

Grommet

Part #KA56DS001

This item is not returnable
$2.63
In Stock
Furnace Blower Fan Motor Mounting Bracket P251-0077
#NI

Front view/rear view diagram

Furnace blower fan motor mounting bracket

Part #P251-0077

This item is not returnable
$5.34
In Stock
Bolt AA06BS228
#NI

Front view/rear view diagram

Bolt

Part #AA06BS228

This item is not returnable
$3.83
In Stock
Blower Wheel LA21RB549
#NI

Front view/rear view diagram

Blower wheel

Part #LA21RB549

$72.82
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

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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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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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

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

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