Hello toofdr - Often this occurs because either a fuse from the fuse box is blown or the switches on the breaker tripped, depending on your house. If your house uses fuses, there are two house fuses that supply voltage to the dryer circuit in your fuse box. If one of the two fuses is blown, the unit may turn on but will not heat. Check and replace fuse in fuse box if necessary. However, if the house has circuit breakers, there may be two breakers with switches that supply voltage to the dryer and if one is tripped the unit as well will experience this issue. The heater of a dryer requires 220 to 240 volts to operate. Try resetting the unit by either unplugging it or flipping the household breaker to the off position. Wait approximately two minutes, turn on the dryer and select a normal cycle. If the issue persists, it could also potentially mean a number of other things: defective cord, wiring, control board or door switch. I would personally contact a professional to accurately diagnose the dryer to determine the root cause to reduce the risk of unnecessary parts.