IK1900249 Service Bulletin/Repair Instructions

IK1900249 ­ LT CRX50 Refrigerator Diagnostics
Page 1 of 4
Countries:
CANADA, UNITED STATES Document ID: IK1900249
Availability:
ISIS, IsSIR
Revision:
3
Major System:
ACCESSORIES
Created:
8/2/2017
Current Language: English
Last Modified: 10/25/2017
Other Languages: NONE
Author:
Viewed:
Greg Scheff
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Title : LT CRX50 Refrigerator Diagnostics

Applies To : All LT Chassis Equipped with the CRX50 Refrigerator
CHANGE LOG

Please refer to the change log text box below for recent changes to this article:

10/25/2017 - Revised door seal inspection guidelines.

08/16/2017 - Updated performance test instructions relating to the freezer door, included refrigerator model affected.

08/03/2017 - Initial Article Release



DESCRIPTION

This document will guide the user through diagnosing refrigerator complaints such as an inoperable refrigerator, under cooling, and

loose door hinges.
The guidelines listed below are for the refrigerator model CRX50 ONLY
CUSTOMER OBSERVATIONS OR CONCERNS:

Some symptoms the customer may experience are a refrigerator that does not come on at all, the refrigerator runs but will not cool

properly, or the door hinges may not stay secure.
SPECIAL TOOL(s) / SOFTWARE

Not Applicable
SERVICE PARTS INFORMATION
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IK1900249 ­ LT CRX50 Refrigerator Diagnostics
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Description
Part Number
Quantity
Notes
Refrigerator, Full Assembly
4086649C92
1
Feature Code 08WLA
DIAGNOSTIC STEP(s)

The steps below will focus one at a time on the three driver complaints that may be present.
LOOSE DOOR HINGE OR SEAL:

Step
Action
Decision
DIAGNOSTIC: Open the refrigerator door and verify the condition.

Yes. Proceed to step 2.

Is the door tight on the hinge?
1
No. Attempt to tighten the hinge screw(s).

If the screw(s) will not tighten then replace

the refrigerator.
Step
Action

DIAGNOSTIC: Verify the door seal is secure.
Decision

Yes. If the seal is loose, cut or damaged,

the refrigerator will need to be replaced.
Check for a loose or damaged seal around the refrigerator door.
Is the seal loose or damaged?
NOTE: A cut or damaged seal is NOT a warrantable condition

2
No. End of door / seal inspection.
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IK1900249 ­ LT CRX50 Refrigerator Diagnostics
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REFRIGERATOR OPERATIONAL CHECKS:
Step
Action
Decision
Open the refrigerator door and verify operation.

Is the light in the interior of the fridge illuminated? If it is NOT, first make certain the

temperature dial is on the ON position.
Yes. Proceed to Refrigerator Performance

Test.
Does the light come on with the door open, and the temperature dial in the ON

position?

1

No. Carefully remove the refrigerator

leaving the harness connected, and

proceed to step 2.
Step
Action
Decision
Verify power at the refrigerator supply.
Yes. Make certain the crimp connectors

or spade terminals are not damaged, and

There needs to be a minimum of 12.0 volts to ensure the fridge controller is not in a that they fit tightly at the connection points

low voltage shutoff mode. Check the main 12 ga. red wire for battery power.

and proceed to step 3.
Is a minimum of 12.0 volts present at the main 12 ga. supply wire?
2

No. Check the power supply circuit for the

cause of the low voltage. Make repairs as

needed and retest for proper operation.
Step

3
Action
Decision
Verify the ground at the refrigerator connection.
Yes. Check the ground circuit for

the source of the poor ground. Make

Supply a known good battery negative connection to the fridge. Now, with a known certain the crimp connectors or spade

good power supply over 12.0 volts, and good ground connection recheck for proper terminals are not damaged, and that they

operation.

fit tightly at the connection points. Make
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IK1900249 ­ LT CRX50 Refrigerator Diagnostics
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wiring repairs as needed and retest for

proper operation.

Does the light illuminate, and the compressor turn on?
No. Replace the refrigerator.
WARRANTY INFORMATION

Warranty Claim Coding:

Group: 19304 - Merchandising Items

Noun: 067 ­ Refrigerator
Refer to the Warranty Coding Manual for Group and Noun Codes.
OTHER RESOURCES

Master Service Information Site
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Copyright © 2017 Navistar, Inc.
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