Avoid the use of an extension cord because of potential safety hazards under certain conditions. If it is necessary to use an extension cord, use only a 3-wire extension cord that has a 3-blade grounding plug and a 3-slot outlet that will accept the plug. The marked rating of the extension cord must be equal to or greater than the electrical rating of the appliance. Do not use an extension cord longer than 12 ft.
Check the Owner's Manual regarding use of an extension cord. Some models (ex. 3.5 cu ft units) do not allow for use of an extension cord.