WenmarOpen by Wenmar Pro

Service bulletin 8378

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id610509
Published by NHTSA2000-05-03
Manufacturer's number8378
Manufacturer's date2000-02-01
NHTSA componentVISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:WINDSHIELD:ELECTRICAL HEATING ELEMENT

NHTSA's summary

SOME CUSTOMERS MAY COMPLAIN THAT THE TEMPERATURE CONTROL SWITCH IS NOT OPERATING SMOOTHLY. THIS BULLETIN CONTAINS PROCEDURES TO REPLACE THE WATER REGULATING VALVE CABLE. *TT

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
FREIGHTLINER BUSINESS CLASS

Listing a model year does not mean every vehicle of it is concerned: the document says which.