Subaru Forester 2014–2017 — technical service bulletin
Bulletin 11-173-17 · NHTSA communication 10117534 · issued Jun 15, 2017
Technical service bulletin
communication type
Equipment
component
2014–2017
model years
4
vehicle entries
Official summary
This bulletin announces availability of ECM reprogramming files designed to optimize the ECM for improving HVAC blower fan speed control. There have been a limited number of cases with reports describing the blower fan speed fluctuating / changing without input from the customer when the blower is set to maximum speed.
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.