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Service bulletins for the 2020 Ford F-550

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

312 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Heating and air conditioning are shown. Show all

Bulletins, newest first
SSM 509372022-07-20. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. Some 2015-2022 F-150, 2017-2022 F-Super Duty and 2018-2022 Expedition/Navigator vehicles may exhibit poor air conditioning (A/C) performance. Workshop Manual (WSM) diagnostic procedures have been updated to more accurately diagnose A/C performance concerns. Refer to the updated Diagnosis and Testing, and General Procedure in the WSM, Section 412-00 Climate Control System for diagnostic procedures
TSB 21-22502021-09-30. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER; ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN. Some 2015-2020 F-150, 2017-2020 Super Duty and 2018-2020 Expedition/Navigator vehicles may exhibit poor air conditioning (A/C) performance, loss of airflow and/or engine cooling fans running continuously from high A/C pressures. This concern may be from the evaporator freezing up due to the evaporator temperature sensor being biased. To correct the condition, follow the Service Procedure steps to replace the evaporator temperature sensor.
TSB 20-21702020-06-05. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. Some 2018-2020 F-150/Expedition/Navigator/F-Super Duty vehicles built on 31-Aug-2018 and through 02-Feb-2020 may exhibit a water leak on the right front floor during and/or after the air conditioning (A/C) is used. This may be due to condensation from the evaporator drain tube entering the vehicle through the drain tube seal. To correct the condition, follow the Service Procedure steps to install an elbow on the evaporator drain tube to direct the condensation away from the seal.
SSM 481352019-09-09. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. Some 2013-2020 vehicles equipped with an EVDC air conditioning (A/C) compressor may exhibit poor A/C performance/improper climate function. To support the proper diagnosis of this compressor, the EVDC control valve tester has been provided to each U.S. dealership (339-EVDC100). Ensure the A/C system has a full charge prior to any compressor diagnostics. To support the proper diagnosis of this compressor, the EVDC compressor tool must be used, and the results recorded in the Technician comments field with the warranty claim. This tester will help reduce the potential for misdiagnosis and unnecessary compressor replacement. Refer to the Rotunda catalog for a video and user manual which provide detailed operating instructions.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.