Honda Prologue 2024 — technical service bulletin
Bulletin A25-028 · NHTSA communication 11020579 · issued Jul 3, 2025
Technical service bulletin
communication type
Visibility/wiper
component
2024
model years
1
vehicle entries
Official summary
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.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.