Frigidaire Washer Error Code EF5

EF5 indicates that the NTC temperature sensor monitoring the hot water inlet valve has detected a reading outside its acceptable limits. The control board uses this sensor to verify water temperature at the hot water valve, and when the signal falls out of range, the fault code is triggered. The first thing to check is whether the hot and cold water supply hoses are connected to the correct inlet ports on the back of the machine.

It is not recommended to continue running the washer while EF5 is active. The fault indicates the control board cannot verify a proper temperature reading at the hot water valve, which means the machine may not be managing water temperature correctly during the wash cycle. Continuing to run the machine could result in improper wash performance or, if hoses are reversed, could introduce very hot water into components not rated for it.

If the fix is simply reconnecting reversed hoses, there is no parts cost involved. If the NTC thermistor or hot water inlet valve assembly needs replacement, parts typically range from $20 to $80 depending on the specific valve assembly. If a professional technician is needed, expect labor costs to add $75 to $150 or more depending on your location and service provider.

Start by turning off the water supply and checking the hose connections at the back of the washer. The hot water hose should connect to the hot inlet port and the cold hose to the cold inlet port. If the hoses are correct, the next step is to test the NTC thermistor on the hot water valve for proper resistance and inspect the wiring harness for damage. If the sensor or valve assembly is defective, that component will need to be replaced.

A power reset may temporarily clear the EF5 code, but if the underlying issue is not resolved, the fault will return when the washer attempts to use the hot water inlet again. Resetting without addressing the root cause, such as reversed hoses or a faulty thermistor, will not provide a lasting fix. Diagnose and correct the problem before relying on a reset to restore normal operation.