Ford F-250 SD 2017–2018 — technical service bulletin
Bulletin TSB 18-2253 · NHTSA communication 10144918 · issued Aug 21, 2018
Technical service bulletin
communication type
Engine and Engine Cooling
component
2017–2018
model years
10
vehicle entries
Official summary
Some 2017-2018 F-Super Duty vehicles equipped with a 6.7L engine built on or before 8-Jul-2018 may exhibit a lack of heat coming from the driver side vents when operating the vehicle in ambient temperatures below -20Å?C (4Å?F). This condition may be due to deposits from the engine coolant trapped in the heater core. Follow the Service Procedure steps to correct the condition.
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.