Kenmore Dryer Error Code EF3

EF3 means the dryer's maximum timeout timer was exceeded during a cycle. This indicates the dryer could not achieve or sustain proper drying conditions within the allowed time. The cause can be a blocked exhaust vent, a faulty Exhaust Control Thermistor, a faulty Inlet Control Thermistor, a failed Contact Sensor, or a defective Electronic Control Board.

You should not continue running the dryer until EF3 is resolved. A blocked exhaust vent can cause heat to build up inside the appliance and create a fire hazard. Faulty thermal sensors mean the control board cannot accurately monitor temperatures, which removes an important safety layer.

Repair costs vary depending on the root cause. Cleaning a blocked vent yourself costs little to nothing, while hiring a vent cleaning service typically runs in the range of $80 to $175. Replacing a thermistor or Contact Sensor generally falls in the $20 to $80 range for parts, plus labor if a technician is involved. An Electronic Control Board replacement is the most expensive scenario, with parts alone often ranging from $100 to $300.

Clearing a lint-clogged or kinked exhaust vent is a straightforward DIY task that resolves EF3 in many cases. If the vent is clear, diagnosing the thermistors and Contact Sensor requires a multimeter and some comfort working around appliance components. Replacing the Electronic Control Board is more involved and may be better suited to a technician.

A reset may temporarily clear the EF3 code, but it will return as soon as the dryer runs another cycle if the underlying issue is not corrected. The timeout condition must be resolved, whether that means clearing a vent blockage or replacing a faulty sensor, before the code will stay cleared permanently.