The 4 most common part(s) or condition(s) which cause the symptom Dryer trips breaker are listed below starting with the most likely. Check or test each item and watch any available videos.
If the dryer trips the home's circuit breaker, the breaker itself might be defective. Over time circuit breakers can become weak and may trip often, even though the amperage draw is below the limit. If the dryer has been checked and seems to be fine, consider having an electrician replace the circuit breaker.
RepairClinic Item # 2438
When heating element assemblies fail, they sometimes short out against the heater housing. Then, the dryer trips the circuit breaker. If the circuit breaker is reset and it trips again, check the heating element assembly for a short circuit.
RepairClinic Item # 2584
Although not as common, if the dryer trips the circuit breaker the drive motor may be defective. When drive motors fail, they sometimes short out internally and trip the circuit breaker.
RepairClinic Item # 527329
Electric dryer power cords attach to the dryer at a terminal block. If any of the wires on the terminal block are loose, they can arc and destroy part of the block. If this happens, one of the wires can short against the body of the dryer and the dryer trips the breaker. This is not common.