Ford Trucks Won’t Heat Up

Some 2015-2019 Ford F-150 trucks equipped with a 3.3L, 3.5L Duratec, 3.5L EcoBoost and 5.0L engine and equipped with a block heater, and built on or before Jan. 1, 2019, may exhibit a lack of heat concern from the HVAC system when operating the vehicle in temperatures below 4 degrees Fahrenheit. 

This may be due to deposits from the engine coolant becoming trapped in the heater core. 

To correct, flush the cooling system and replace the heater core.

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Information courtesy of Mitchell 1

Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.

About the Author

Mike Mavrigian | Editor

Mike received a BA degree from Youngstown State University in English Literature with a minor in Journalism in 1975.