Frigidaire Washer Error Code E66

E66 on a Frigidaire washer indicates a heating element relay failure. The control board monitors the relay that switches power to the internal wash heater, and when it detects that the relay is not operating correctly, it triggers this fault code. The washer will typically stop the cycle to prevent damage from an uncontrolled heating condition.

A power reset may temporarily clear the E66 code, but the fault will return if the underlying cause, whether a failed heating element, a damaged relay, or a faulty control board, has not been repaired. Resetting without diagnosis and repair is not a long-term solution and the washer may continue to interrupt cycles.

Repair costs depend on which component has failed. Replacing a heating element typically costs between $80 and $200 including parts and labor. Control board replacement is more expensive, generally ranging from $150 to $350 or more depending on the board price and labor rates in your area. Getting a diagnostic estimate from a technician before authorizing repairs is a good practice.

A knowledgeable DIYer can begin by testing the resistance of the heating element using the procedure outlined in test 14 of the Frigidaire diagnostic guide. If the element tests out of range, replacing it is a manageable repair. However, if the fault points to the control board relay, board replacement requires comfort working with appliance electronics and is often best left to a qualified technician.

It is not recommended to continue using the washer while E66 is active. A relay fault related to the heating element can result in uncontrolled heating, which poses a risk of overheating the water or damaging internal components. The washer should be diagnosed and repaired before returning to regular use.