The official notice
Defect
On certain trucks with a 3.5-L engine, there could be a problem with the engine block heater cable. The wrong cable may have been installed when your vehicle was repaired under a previous recall. The cable that was installed may not have enough heat protection and could be damaged by high engine temperatures. When plugged in, this could cause a short circuit to occur, resulting in overheated or melted wiring. It could also cause the block heater not to work, and/or it could cause a household circuit breaker to trip. For details of the previous recall, please see Transport Canada recall no. 2019-174 (Ford no. 19S11/19G01).
Safety Risk
Overheated or melted wiring could create the risk of a fire.
Remedy
Do not use your block heater until the recall inspection and repairs are completed. Ford will notify owners by mail and instruct you to take your vehicle to a dealer to inspect the block heater and cable. Depending on the results of the inspection, the heater element and/or block heater cable will be replaced, as necessary. If the replacement parts are not available, the dealer will disable the engine block heater. Ford will send you another notice when the replacement parts are available, and will ask you to take your vehicle to a dealer to have them installed.