2013 Ford F350 Super Duty Super Cab Owner Manual Printing 3 - Page 188

Starting and Stopping the Engine 187 • Make sure that when in operation, the extension cord plug and the heater cord plug connections are free and clear of water. This could cause an electric shock or fire. • Make sure your vehicle is parked in a clean area, clear of combustibles. • Make sure the heater, heater cord and extension cord are firmly connected. • Check for heat anywhere in the electrical hookup once the system has been operating for approximately 30 minutes. • Make sure the system is unplugged and properly stowed before driving your vehicle. Make sure the protective cover seals the prongs of the block heater cord plug when not in use. • Keep plug terminals clean and free of dirt and corrosion. • Make sure the heater system is checked for proper operation before winter. Using the Engine Block Heater Make sure the receptacle terminals are clean and dry prior to use. Clean them with a dry cloth, if necessary. The heater uses 0.4 to 1.0 kilowatt-hours of energy per hour of use. The system does not have a thermostat. It achieves maximum temperature after approximately three hours of operation. Using the heater longer than three hours does not improve system performance and unnecessarily uses electricity. 2013 F-250/350/450/550 (f23) Owners Guide gf, 3rd Printing, December 2012 USA (fus)