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Service bulletin TechTalk7831

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 id10182135
Published by NHTSA2020-11-04
Manufacturer's numberTechTalk7831
Manufacturer's date2020-10-26
NHTSA componentEQUIPMENT:APPLIANCE:AIR CONDITIONER; ELECTRICAL SYSTEM:SOFTWARE

NHTSA's summary

Tech Talk discussion on P4 bunk blower on low all the time after software updates.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Equipment and accessories, Heating and air conditioning, Software

Vehicles listed
FREIGHTLINER BUSINESS CLASS M22020

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