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Service bulletin FT4689

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 id10166463
Published by NHTSA2019-10-21
Manufacturer's numberFT4689
Manufacturer's date2019-09-05
NHTSA componentEQUIPMENT:APPLIANCE:AIR CONDITIONER; ENGINE; ENGINE AND ENGINE COOLING

NHTSA's summary

AC Air Flow Issues

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

Engine, Equipment and accessories, Heating and air conditioning

Vehicles listed
NOVA BUS LFS2018

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

Recalls for the same vehicles and component
22V3230002022-05-11. EQUIPMENT; EXTERIOR LIGHTING
20191712019-04-05. Engine

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
LI5316ER22024-02-24. Service bulletin. Crank case vent (CCV) hoses may get damaged over time.
LI5427E2023-12-22. Service bulletin. Improved durability of engine-side heat exchanger hoses.
FT54632023-09-26. Service bulletin. Failure of camera bracket will cause the camera to swing while bus is in motion.
FT46512023-08-17. Service bulletin. Failure of DEF sensor GEN 6 within the expected 5-years lifespan.
BS5320ER12023-04-03. Service bulletin. Fire light coming on in the dash, Fire detection system
FT52432023-02-25. Service bulletin. ECP radiator failures deemed to be due to overpressure events.
APS5370E2023-02-24. Service bulletin. The Delco-Remy alternator is obsolete. Air cooled ductless (Almott) alternator, power cable and hardware kit to replace the Delco-Remy oil-cooled alternator.
LI5316ER12022-12-22. Service bulletin. Crank case vent (CCV) hoses may get damaged over time.
li5316E2022-12-03. Service bulletin. Crank case vent (CCV) hoses may get damaged over time.
BS5300E2022-10-03. Service bulletin. HVAC deflectors are breaking at the folded attachment points. The brackets broke right at the bending due to a sharp curve