Lack of heat concern from the heating ventilation and air conditioning (HVAC) system when operating the...

Bulletin number

TSB 18-2244

Component

Engine and engine cooling

Summary

Some 2015-2018 F-150 vehicles equipped with a 3.3L, 3.5L Duratec, 3.5L EcoBoost and 5.0L engine without a block heater may exhibit a lack of heat concern from the heating ventilation and air conditioning (HVAC) system when operating the vehicle in temperatures consistently below -20 degrees C (4 degrees F). This condition may be due to deposits from the engine coolant becoming trapped in the heater core. Follow the Service Procedure steps to correct the condition.

Owners of these vehicles have filed 1,591 complaints in the engine category.