Afterblow Enabling
WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
Afterblow is a feature that dries the evaporator core by operating the blower motor after the engine is turned off. This aids in reducing microbial growth that can create undesirable odors.
The vehicle does not come equipped with the afterblow feature turned on. If the afterblow feature is required due to an odor concern, it must be enabled by using the scan tool.
Use the following procedure to enable the afterblow feature:
- Connect the Scan Tool.
- Ignition ON/ Vehicle in Service Mode
- Select Module Diagnostics.
- Select HVAC Control Module.
- Select Configuration/Reset Functions.
- Select HVAC Afterblow Configuration.
When afterblow has been enabled, the following conditions must be met for the HVAC control module to operate afterblow:
- The vehicle must be turned OFF.
- The outside air temperature must be at least 11°C (52°F) when the compressor was last operating before the engine was turned OFF.
- The A/C compressor must have operated for more than 2 minutes before the engine was turned OFF.
- The system voltage must be above 12 V.
Once the above conditions have been met, the blower motor will operate at a low blower speed, following the sequence below up to 5 times:
- The blower motor will be OFF for 7 - 11 minutes.
- The blower motor will operate for 20 - 60 seconds.