Kenmore Dryer Error Code EF1

EF1 signals that the dryer has detected high vent restriction or a problem with one of its thermal sensors. The code can be caused by a blocked exhaust vent, a defective Exhaust Control Thermistor, a defective Inlet Control Thermistor, or a faulty Electronic Control Board. The dryer stops the cycle to prevent overheating. Start by inspecting the full vent path before testing any electrical components.

Begin by cleaning the lint screen and inspecting the entire exhaust duct from the back of the dryer to the exterior vent cap, removing any lint buildup, kinks, or obstructions. If the vent is clear, use a multimeter to check the resistance of both the Exhaust Control Thermistor and the Inlet Control Thermistor. Replace any thermistor that tests out of its specified range. If both thermistors are good, the Electronic Control Board may need to be replaced.

If the problem is simply a clogged vent, professional duct cleaning typically costs between $80 and $175 depending on duct length and access. Replacing a thermistor is generally a lower-cost repair, with parts usually ranging from $15 to $50 and labor adding $75 to $150 if a technician performs the work. An Electronic Control Board replacement is the most expensive scenario, with parts and labor commonly ranging from $200 to $400 or more depending on the specific model.

A reset may temporarily clear the EF1 code, but it will return if the underlying problem is not fixed. If a vent blockage or a failed thermistor is present, the code will reappear once the dryer runs and the fault condition is detected again. Always address the root cause before assuming a reset has resolved the issue.

Yes, particularly when the cause is a blocked vent. Restricted exhaust airflow forces the dryer to operate at higher internal temperatures, which increases the risk of overheating and can become a fire hazard over time. Do not continue running the dryer until the vent restriction has been cleared or the faulty component has been identified and replaced.