How to Fix Maytag Dryer Error F3E4

Error Code: Dryer Difficulty: Moderate

Problem: Inlet and exhaust thermistor readings differ by more than 30°F indicating sensor mismatch or airflow problem

How to Fix Dryer Error

1. Disconnect power and remove both front lower panel and rear panel for access to both thermistors.
2. Locate inlet thermistor WP35001191 (front/blower housing) and exhaust thermistor WP3392519 (rear/exhaust duct).
3. Disconnect both thermistors and measure resistance simultaneously with two multimeters or swap positions to verify readings match within 5%.
4. If one thermistor reads significantly different, replace that sensor.
5. If both thermistors test within specification, diagnose airflow restriction: remove lint screen and clean thoroughly, inspect flexible vent hose for kinks/crushing, verify exterior vent flap opens freely, clean blower wheel housing of lint buildup.
6. Check drum seals for tears allowing air bypass.
7. Replace faulty thermistor(s)—WP35001191 for inlet, WP3392519 for exhaust.
8. Reassemble and run test cycle with vent disconnected temporarily to verify proper temperature differential (exhaust should run 20-30°F hotter than inlet during heating).
9. Reconnect vent system and verify F3E4 does not return.