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Service bulletin REHS-8421

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 id10052496
Published by NHTSA2013-08-06
Manufacturer's numberREHS-8421
Manufacturer's date2013-05-13
NHTSA componentEQUIPMENT:APPLIANCE:AIR CONDITIONER

NHTSA's summary

CATERPILLAR: SOME AIR CONTROL VALVE (ACV) HAD PLUGS INSTALLED BACKWARDS IN EMPTY CONNECTOR CAVITIES. THE EMPTY CONNECTOR CAVITIES PERMITTED WATER INTRUSION, SHORTING OUT TERMINALS. MODEL CT660. MODEL YEARS NOT LISTED. *PE

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

Equipment and accessories, Heating and air conditioning

Vehicles listed
CATERPILLAR CT6602012 to 2014

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