A whistle noise may be present within the HVAC system when switching from cabin heat to full cooling (A/C on)

Bulletin number

A25-028

Component

Visibility/wiper

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.

Owners of these vehicles have filed 14 complaints in the visibility category.