WenmarOpen by Wenmar Pro

Service bulletin TSB 21-2250

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10201612
Published by NHTSA2021-09-30
Manufacturer's numberTSB 21-2250
Manufacturer's date2021-09-02
NHTSA componentEQUIPMENT:APPLIANCE:AIR CONDITIONER; ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN

NHTSA's summary

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.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine, Equipment and accessories, Heating and air conditioning, Cooling fan, Cooling system

Vehicles listed
FORD EXPEDITION2018, 2019, 2020
FORD F-1502015, 2016, 2017, 2018, 2019, 2020
FORD F-250 SD2017, 2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
FORD F-350 SD2017, 2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
FORD F-450 SD2017, 2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
FORD F-550 SD2017, 2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
LINCOLN NAVIGATOR2018, 2019, 2020

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
TSB 22-20892022-03-15. Service bulletin. Some 2015-2022 F-150, 2017-2022 F-Super Duty and 2018-2022 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.
SSM 479992019-06-07. Service bulletin. Some 2016-2019 F-Super Duty and 2016-2019 F650-750 vehicles equipped with 6.7L engine may exhibit a concern where the engine cooling fan stays on at all times or is inoperative. Diagnostic trouble codes (DTCs) P0480, P0494, P0495, P0529, P0691, P0692, P0693 and/or P0694 may be stored in the powertrain control module (PCM). To address these vehicle symptoms, use the updated online version of pinpoint test AH in the powertrain control/emission diagnostic (PC/ED) tab on the PTS website. The pinpoint test has been updated to aid in preventing unnecessary fan clutch replacement.
SSM 477912019-04-08. Service bulletin. Some 2015-2019 F150/Edge, 2016-2018 MKX, 2019 Nautilus and 2017-2019 Fusion/Continental vehicles equipped with a 2.7L engine may exhibit a malfunction indicator lamp (MIL) and/or wrench lamp with diagnostic trouble codes (DTCs) P0116, P0117, P0118, P0119, P0217, P0330, P1026, and/or P130D. This may be due to a engine coolant temperature (ECT) sensor connector which is not fully seated or damaged wiring between connectors C1064 and C1047 for F150 and C1016 and C1168 for Edge/MKX/Nautilus/Fusion/Continental vehicles. ECT sensors should not be replaced if damaged wiring is found at or near these connectors. For claiming, use causal part 12A699 and applicable labor operations in Section 10 of the Service Labor Time Standards (SLTS) Manual.
SSM 460852017-08-01. Service bulletin. The Powertrain Control/Emissions Diagnosis (PC/ED) manual has been revised for diagnosing electronic throttle bodies (ETBs). The ETC_ACT and ETC_DSD PIDs should not used to diagnose possible ETB concerns. The IDS has a limited refresh rate when reading these PIDs and cannot display quickly enough to validate a concern. The PCM automatically monitors these inputs more accurately and will set diagnostic trouble codes (DTCs) when appropriate. Using these PIDs for diagnostics will lead to inaccurate results and improper ETB replacements. If a concern is intermittent and no DTCs are present, refer to historical DTCs and the PC/ED, Section 3 No DTCs Present Index chart for further information.
UPS-16-U-11-S12016-08-31. Service bulletin. COOLANT CONCENTRATION ADJUSTMENT
16U112016-07-07. Service bulletin. Coolant Concentration Adjustment In some of the affected vehicles, the engine coolant to water concentration may be less than specification. Low coolant concentration could result in reduced cooling system freeze protection, reduced corrosion resistance, heater and radiator performance degradation, and water pump noise or leaks.
15-00732015-07-28. Service bulletin. FORD 2015 F-150, MUSTANG: BULLETIN INFORMATION INVOLVING CERTAIN FORD VEHICLES EQUIPPED WITH A 5.0L DUAL OVERHEAD CAMSHAFT ENGINE MAY EXPERIENCE HAVING COOLANT LEAK CAUSED BY A HEATER OUTLET HOSE WHICH HAVE BECOME DISCONNECTED AT THE HEATER OUTLET TUBE ON THE COOLANT PUMP. *LJ