First use a meter to test the outlet for 240. the dryer itself will run with 120 but needs 240 for the heater to work - sometimes half of the line will trip (if you only read 120 then flip the breaker and that should reset it) if full 240 is there then check cord connections to dryer (will have a few screws holding on a cover plate that covers up the connections). if those wires are fine and not burnt up or corroded then check the heating element for continuity (if u have continuity it is ok)