# Service bulletin 83\-25

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10076464
- Published by NHTSA: 2016\-07\-14
- Manufacturer's number: 83\-25
- Manufacturer's date: 2015\-10\-01
- NHTSA component: VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM

## NHTSA's summary

Side Window Defroster and Cooling Improvement Retrofit This procedure improves the side window defrost function and overall A/C performance on Western Star 4700, 4800, 4900, 6900 models. In extreme cold conditions, the side windows may ice up and limit visibility. A retrofit kit \(WWS RD\-3\-19025\-0\) is available to remedy the side window issue. See Fig. 1 for installation parts. Installation of the new louvers directs air flow to the side windows. Installing the fresh\-air door\-stop bracket, and sealing leaks in the A/C ducting, significantly improves air flow in heater/defrost and cooling modes, providing noticeable improvement in overall system performance.

## The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

## Components

Glass, wipers and mirrors, Heating and air conditioning

## Vehicles listed

- WESTERN STAR 5900
- WESTERN STAR CONSTELLATION
- WESTERN STAR HERITAGE

JSON: [/v1/bulletins/10076464](/v1/bulletins/10076464)

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