F03Maytag Dryer — Maytag Dryer F03 Error Code

F03 indicates the moisture sensor — two metallic bars mounted inside the drum — is malfunctioning. The dryer uses these bars to detect the conductivity of wet fabric as it tumbles past them. As clothes dry, conductivity decreases and the bar signal drops, telling the control board when to end the cycle. When F03 appears, the sensor bars are either coated with dryer sheet residue (most common cause), physically damaged, or the wiring connecting them to the control board has failed. A faulty moisture sensor causes the dryer to run too long or end cycles too early.

Locate the two metallic sensor bars inside the drum, typically below the door opening. Wipe them with a cloth dampened in rubbing alcohol to remove dryer sheet residue — this alone resolves F03 in many cases. Allow to dry completely before running a cycle. If F03 persists after cleaning, test continuity between the sensor bars and the control board using a multimeter. A broken wire in the harness or a physically cracked sensor bar requires replacement.