Frigidaire Dryer Error Code E51

E51 indicates a fault in the motor control circuit. Depending on the dryer model, it can mean the motor relay is stuck open or closed, the thermal limiter has tripped, the motor centrifugal switch is stuck, there is a wiring fault, or the power supply voltage is too low. On push button models, the fault is specifically tied to the motor relay (RL2) or defective wiring in that circuit.

No, you should not continue operating the dryer with an active E51 code. A stuck-closed motor relay can keep the motor running outside of normal cycle operation, which creates a risk of overheating. Stop using the dryer and diagnose the fault before running another cycle.

A power cycle reset may temporarily clear the E51 code, but the error will return if the underlying fault is not repaired. If the thermal limiter has opened, it cannot reset itself and must be replaced. If the motor relay on the control board has failed, the fault will reappear as soon as the dryer attempts to start a cycle.

Some causes of E51 are DIY-friendly, such as checking the power supply voltage or inspecting wiring connectors for obvious damage. Testing the thermal limiter with a multimeter is also manageable for a knowledgeable DIYer. However, replacing the control board or drive motor is more involved and requires comfort working with electrical components and appliance disassembly.

Repair costs vary based on the failed component. Replacing a thermal limiter is typically the least expensive fix, with parts usually ranging from $10 to $30. A replacement control board can range from $80 to $200 or more depending on the model. Drive motor replacement with labor can bring the total to $150 to $350 or higher. Getting a diagnosis first helps clarify whether the repair is cost-effective.