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Service bulletin FSB 873-020

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 id10116458
Published by NHTSA2017-08-25
Manufacturer's numberFSB 873-020
Manufacturer's date2016-05-11
NHTSA componentEQUIPMENT:APPLIANCE:AIR CONDITIONER

NHTSA's summary

HVAC Flange, Installation, CHU, CXU, GU, TD

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

Equipment and accessories, Heating and air conditioning

Vehicles listed
MACK CHU
MACK CXU
MACK GU
MACK TD

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