Ford F-250 SD 2020–2022 — technical service bulletin
Bulletin SSM 51170 · NHTSA communication 10226736 · issued Nov 1, 2022
Technical service bulletin
communication type
Engine and Engine Cooling
component
2020–2022
model years
12
vehicle entries
Official summary
Some 2020-2022 F-Super Duty vehicles equipped with a 6.7L engine may exhibit an A/C system blowing only warm air. This may be due to the powertrain control module inhibiting the engagement of the air conditioning compressor clutch with parameter identification (PID) AC_INHIBIT_11 status showing TRUE. If this PID shows TRUE but the ambient air temperature PID reads correctly, this may be due to a disconnected mass air flow sensor with the ignition on, especially after checking the condition of the engine air filter. To correct the condition, clear all diagnostic trouble codes and perform the HV
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.