OPERATING CIRCUIT OF ELECTRIC HOT-AIR HEATER

PROBLEM TO BE SOLVED: To make it possible to restrain the operation-controlling manipulation of a switch from affecting the service life of a relay. SOLUTION: By the use of relays 3a, 3b, 3c, 3d which act in accordance with how switches 7a, 7b controlling the operation are put the operation is controlled with respect to a fan motor 4a, a first heater element 4b, a second heater element 4c all being loads contributing to creation of a current of warm air. Timers 1a, 1b are provided, by which the relays are made to act with a prescribed lag after handling of the switch. The switch may be a starting switch 7a; the relay my be one which specifies one of a plurality of operation modes in accordance with the handling of the starting switch. The switch may be a changeover-mode switch 7b; the relay may preferably be one which selects one of a plurality of operation nodes in accordance with the handling of the changeover-mode switch.