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Carrier
Heating & Cooling Combined Unit

Model # 48CEN030040300 Official Carrier package unit

Here are the diagrams and repair parts for Official Carrier 48CEN030040300 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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Showing 10 of 112 parts  |
Contactor HN51KB024
#NI

Cabinet parts 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
Temp Swtch HH18HA211
#NI

Cabinet parts diagram

Temp swtch

Part #HH18HA211

$25.71
In Stock
Furnace Burner 50DK407030
#NI

Cabinet parts diagram

Furnace burner

Part #50DK407030

$39.89
In Stock
Pcb Assembly HK42FZ021
#NI

Cabinet parts diagram

Pcb assembly

Part #HK42FZ021

Replaced by #HK42FZ035

?
Manufacturer substitution
This part replaces HK42FZ021. Substitute parts can look different from the original.
$809.30 | 
$12.00 OFF Phone Price : $821.30
In Stock
Switch HH18HA454
#NI

Cabinet parts diagram

Switch

Part #HH18HA454

$139.46
In Stock
Grommet KA56DS001
#NI

Cabinet parts diagram

Grommet

Part #KA56DS001

This item is not returnable
$2.63
In Stock
Central Air Conditioner Electronic Control Board Model Plug HK70EZ025
#NI

Cabinet parts diagram

Central air conditioner electronic control board model plug

Part #HK70EZ025

$30.27
In Stock
Furnace Blower Fan Motor Mounting Bracket P251-0077
#NI

Cabinet parts diagram

Furnace blower fan motor mounting bracket

Part #P251-0077

This item is not returnable
$5.34
In Stock
Grommet KA56GR140
#NI

Cabinet parts diagram

Grommet

Part #KA56GR140

This item is not returnable
$2.97
In Stock
Panel 48GS500010
#37

Cabinet parts diagram

Panel

Part #48GS500010

$197.38
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
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How to replace the furnace flame sensor

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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

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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