Freightliner Cascadia 2020–2021 — technical service bulletin
Bulletin SS1034762 · NHTSA communication 10179151 · issued Aug 25, 2020
Technical service bulletin
communication type
Equipment
component
2020–2021
model years
2
vehicle entries
Official summary
Service Solution for P4 Cascadia Front HVAC Evaporator Freezing. Front evaporator freezes creating ice buildup, reducing airflow through the vents. The evaporator freezing condition is very hard or cannot be duplicated, in a repair facility. Because the condition is hard to duplicate, determining root cause is still under investigation.
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.