WenmarOpen by Wenmar Pro

Service bulletin 18

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 id615968
Published by NHTSA2001-02-06
Manufacturer's number18
Manufacturer's date2000-12-22
NHTSA componentVISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM

NHTSA's summary

SOME VEHICLES MAY EXHIBIT HOT AIR WHEN THE BLEND AIR ACTUATOR IN THE SLEEPER HVAC UNIT REMAINS IN THE FULL HOT POSITION. *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
PETERBILT 3872000

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

Other bulletins for the same vehicles and component
02-1602021-03-10. Service bulletin. Information Only – Windshield washer pumps have a high No Trouble Found rate. Washer pumps may fail to spray due to a clogged filter.
18042004-12-06. Service bulletin. MODEL 387 HVAC SYSTEM MAINTENANCE. PETERBILT. *TT