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Carrier
Heating & Cooling Combined Unit

Model # 48DU042090300 Official Carrier package unit

Here are the diagrams and repair parts for Official Carrier 48DU042090300 package unit, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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Showing 10 of 146 parts  |
Contactor HN51KB024
#63

Control box/control panel assy diagram

Contactor

Part #HN51KB024

Replaced by #90-244

?
Manufacturer substitution
This part replaces HN51KB024. Substitute parts can look different from the original.
$26.61 | 
18% OFF Phone Price : $32.61
In Stock
Switch,prs HK06WC061
#68

Control box/control panel assy diagram

Switch,prs

Part #HK06WC061

$62.29
In Stock
Pcb Assembly HK38EA008
#74

Inside view diagram

Pcb assembly

Part #HK38EA008

Replaced by #HK38EA023

?
Manufacturer substitution
This part replaces HK38EA008. Substitute parts can look different from the original.
$971.19 | 
$12.00 OFF Phone Price : $983.19
In Stock
Harness Ay 48DU400001
#56

Control box/control panel assy diagram

Harness ay

Part #48DU400001

$580.53
In Stock
Side Panel 48GS500236
#37

Front view/rear view diagram

Side panel

Part #48GS500236

$299.40
In Stock
Plug Assembly HY07MP261
#55

Control box/control panel assy diagram

Plug assembly

Part #HY07MP261

$104.48
In Stock
Bracket 48GS500186
#131

Burner assy diagram

Bracket

Part #48GS500186

$24.46
In Stock
Motor HC35GE238
#91

Front view/rear view diagram

Motor

Part #HC35GE238

$520.82
In Stock
Fan LA01EA025
#90

Front view/rear view diagram

Fan

Part #LA01EA025

$151.14
In Stock
Exchanger 48XZ660004
#140

Inside view diagram

Exchanger

Part #48XZ660004

$1086.80
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 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

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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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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