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Service bulletin TSB 20-01

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 id10189723
Published by NHTSA2021-04-05
Manufacturer's numberTSB 20-01
Manufacturer's date2021-03-24
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

From November 2020 to February 2021, units produced at Plant 250 have a wire missing that would cause the 120VAC load shedding to not work properly. This affects model year 2021 31E, 31EV, 31W, 31WV, SL31, SE31, LF31, and WS31 floor plans with the 2 A/C option

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

Vehicles listed
THOR MOTOR COACH FOUR WINDS2021
THOR MOTOR COACH QUANTUM2021
THOR MOTOR COACH redundant CHATEAU2021

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