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Service bulletin A26-094

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 id11038471
Published by NHTSA2026-10-15
Manufacturer's numberA26-094
Manufacturer's date2026-10-07
NHTSA componentVISIBILITY/WIPER

NHTSA's summary

Service Bulletin - Some vehicles may experience a lack of HVAC heating output with vehicle in ON mode. This condition typically occurs at key-on when the ambient temperature is 77°F or below and may persist for approximately 15 minutes or longer. During diagnosis, technicians may find DTC P0534 (A/C Refrigerant Charge Low) stored.

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

Glass, wipers and mirrors, Wipers and washers

Trouble codes named

P0534

Vehicles listed
HONDA PROLOGUE2025

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

Other bulletins for the same vehicles and component
ONL6PV0920262026-10-01. Other. Owner Notification Letter - The cabin may not be effectively cooled by the HVAC blower motor when the key fob is used to remotely lower the windows.
A26-0572026-08-05. Service bulletin. Service Bulletin - The cabin may not be effectively cooled by the HVAC blower motor when the key fob is used to remotely lower the windows.
A26-0572026-07-01. Service bulletin. Service Bulletin - The cabin may not be effectively cooled by the HVAC blower motor when the key fob is used to remotely lower the windows.
AEBM062620269012026-07-01. Other. Dealer Message - Due to software programming issues, the cabin may not be effectively cooled by the HVAC blower motor when the key fob is used to remotely lower the windows.
A25-0282026-03-24. Service bulletin. Service Bulletin - A whistle noise may be present within the HVAC system when switching from cabin heat to full cooling (A/C on). While driving, the heat may begin to blow cold air and the blower speed may drop intermittently due to possible faulty air conditioner condenser check valve or improperly formed A/C line at the mating surface of the condenser check valve.
A25-0282026-03-16. Service bulletin. Service Bulletin - A whistle noise may be present within the HVAC system when switching from cabin heat to full cooling (A/C on). While driving, the heat may begin to blow cold air and the blower speed may drop intermittently.
A25-0282026-03-03. Service bulletin. Service Bulletin - A whistle noise may be present within the HVAC system when switching from cabin heat to full cooling (A/C on). While driving, the heat may begin to blow cold air and the blower speed may drop intermittently. Possible DTC codes P0530 (Air Conditioning Refrigerant Pressure Sensor Circuit) and P0534 (Air Conditioning Refrigerant Charge Low) may be set.