Maytag Dryer Error Code F4E3

F4E3 means the control board has detected restricted or low airflow in the dryer's exhaust system. The board uses thermistor readings to monitor airflow conditions, and it throws this code when those readings fall outside acceptable limits. The restriction is usually physical, such as a clogged lint screen or blocked exhaust duct, but a faulty thermistor can also produce the code.

Running the dryer with an active F4E3 code is not advisable. Restricted airflow causes heat to build up inside the drum and exhaust system, which increases the risk of overheating and is a potential fire hazard, particularly if lint accumulation in the duct is the cause. Stop using the dryer until you have identified and corrected the source of the restriction.

Yes, a lint-clogged exhaust duct is one of the most common causes of F4E3. Lint accumulates inside the duct run over years of use, and the restriction it creates reduces airflow below what the control board considers acceptable. Cleaning the full length of the duct, not just the section immediately behind the dryer, often resolves the code entirely.

Start by cleaning the lint screen thoroughly and checking the exhaust duct for kinks, blockages, or lint buildup along its entire length, including the exterior vent flap. If the duct and screen are clear, check that the exhaust fan spins freely and the blower wheel is intact. If airflow looks normal but the code persists, the thermistors should be tested using TEST #4a on page 16 of the service manual; a thermistor reading outside its specified resistance range requires part replacement.

If the cause is a clogged lint screen or blocked exhaust duct, there is no parts cost, only the time to clean the system. Professional duct cleaning services typically run $80 to $180. If the exhaust fan motor or blower wheel needs replacement, parts generally cost $30 to $90, with professional labor adding $100 to $200 depending on your area. A thermistor replacement is less expensive, usually $15 to $40 for the part, making it a practical DIY repair if you are comfortable with basic disassembly.