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Carrier
Central Air Conditioner

Model # 38YXA048 SERIES300 Official Carrier heat pump

Here are the diagrams and repair parts for Official Carrier 38YXA048-SERIES300 heat pump, as well as links to manuals and error code tables, if available.

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Installation guide
Owner’s manual

Model diagram and schematic

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ALL PARTS
Showing 10 of 76 parts  |
Contactor HN51KC024
#30

Control box diagram

Contactor

Part #HN51KC024

Replaced by #90-244

?
Manufacturer substitution
This part replaces HN51KC024. Substitute parts can look different from the original.
BEST SELLER
$26.61 | 
18% OFF Phone Price : $32.61
In Stock
Strap Cap 317739-303
#33

Control box diagram

Strap cap

Part #317739-303

$9.20
In Stock
Cap 320238-401
#8

Outlet grille/top cover diagram

Cap

Part #320238-401

Replaced by #330798-7011

?
Manufacturer substitution
This part replaces 320238-401. Substitute parts can look different from the original.
$29.24
In Stock
Drier KH45LG141
#NI

Outlet grille/top cover diagram

Drier

Part #KH45LG141

$214.04
In Stock
Relay P283-9930
#NI

Outlet grille/top cover diagram

Relay

Part #P283-9930

$124.98
In Stock
Oiler P903-1625
#20A

Compressor/condenser diagram

Oiler

Part #P903-1625

$142.28
In Stock
Switch HH18HA276
#NI

Outlet grille/top cover diagram

Switch

Part #HH18HA276

$40.64
In Stock
Accumulatr KH71KR163
#67

Compressor/condenser diagram

Accumulatr

Part #KH71KR163

$314.25
In Stock
Payne Piston EA52PH063
#NI

Outlet grille/top cover diagram

Payne piston

Part #EA52PH063

$26.91
In Stock
Paint 313974-751
#NI

Outlet grille/top cover diagram

Paint

Part #313974-751

$60.89
In Stock

Symptoms for gas pressure washers

Choose a symptom to see related pressure washer repairs.

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Why won't my pressure washer mix in the detergent?

Main causes: using a high-pressure spray tip when applying detergent, clogged siphon tube, chemical injection system fai…

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Why is smoke coming from the pressure washer's exhaust?

Main causes: overfilling engine with oil, improper fuel/air mixture, choke system problems, dirty carburetor, engine nee…

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Why won't the pressure washer starter rope retract?

Main causes: broken recoil spring, damaged recoil starter…

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Why does my pressure washer's engine lose power?

Main causes: dirty air filter, stale fuel, clogged or dirty carburetor, bad unloader valve…

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Why is the spray from my pressure washer weak?

Main causes: insufficient water supply, clogged water inlet screen, clogged pressure hose, faulty pump check valves, stu…

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Why doesn't my pressure washer recoil starter work?

Main causes: damaged recoil starter, oil inside cylinder, locked up engine piston…

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Why does my pressure washer spray too hard?

Main causes: faulty unloader valve, bad pressure regulator…

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Why won't my pressure washer engine start?

Main causes: stale fuel, gummed up carburetor, engine needs tune up, throttle and choke controls need adjustment, bad re…

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Why does water spray out of my pressure washer's pressure relief valve?

Main causes: pump running for more than 5 minutes when the spray wand isn't being used, faulty pressure relief valve, ba…

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Repair guides for gas pressure washers

These step-by-step repair guides will help you safely fix what’s broken on your pressure washer.

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How to install a pressure washer check valve kit

How to install a pressure washer check valve kit

Air in the inlet water supply can damage the check valves. If the pump won’t build up pressure due to damaged check valv…

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Repair difficulty
Time required
 120 minutes or less
How to install a pressure washer O-ring kit

How to install a pressure washer O-ring kit

O-rings seal fittings on the pressure washer pump. Damaged seals allow water to leak from the pump. Follow these steps t…

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Repair difficulty
Time required
 45 minutes or less
How to install a pressure washer chemical injection kit

How to install a pressure washer chemical injection kit

The chemical injection valve draws detergent into the pump. If it’s not drawing detergent, use a repair kit to replace t…

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Repair difficulty
Time required
 15 minutes or less

Effective articles & videos to help repair your central air conditioners

Use the advice and tips in these articles and videos to get the most out of your pressure washer.

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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 prevent the 2 most common AC failures from ruining your summer

How to prevent the 2 most common AC failures from ruining your summer

Get tips to help keep your central AC running all summer long…

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Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

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