2011 Ford F450 Super Duty Crew Cab Owner Guide 4th Printing - Page 266

Driving WARNING: If you smell exhaust fumes inside your vehicle, have your dealer inspect your vehicle immediately. Do not drive if you smell exhaust fumes. Important ventilating information If the engine is idling while the vehicle is stopped for a long period of time, open the windows at least 1 inch (2.5 cm) or adjust the heating or air conditioning to bring in fresh air. ENGINE BLOCK HEATER (IF EQUIPPED) An engine block heater warms the engine coolant which aids in starting and allows the heater/defroster system to respond quickly. If your vehicle is equipped with this system, your equipment includes a heater element which is installed in your engine block and a wire harness which allows the user to connect the system to a grounded 120 volt A/C electrical source. The block heater system is most effective when outdoor temperatures reach below 0°F (-18°C). For flexible fuel vehicles, if operating with E85 ethanol, an engine block heater must be used if ambient temperature is below 0°F (-18°C). See Cold weather starting earlier in this chapter for more information on starting with ethanol. WARNING: Failure to follow engine block heater instructions could result in property damage or physical injury. WARNING: To reduce the risk of electrical shock, do not use your heater with ungrounded electrical systems or two-pronged (cheater) adapters. Prior to using the engine block heater, follow these recommendations for proper and safe operation: • For your safety, use an outdoor extension cord that is product certified by Underwriter's Laboratory (UL) or Canadian Standards Association (CSA). Use only an extension cord that can be used outdoors, in cold temperatures, and is clearly marked "Suitable for Use with Outdoor Appliances." Never use an indoor extension cord outdoors; it could result in an electric shock or fire hazard. • Use a 16 gauge outdoor extension cord, minimum. 266 2011 F-250/350/450/550 (f23) Owners Guide, 4th Printing USA (fus)