Whirlpool Dryer Error Code F3 E5 — Moisture Sensor Strip Failure
What this means
The F3 E5 error code on Whirlpool dryers indicates the moisture sensor strip is either shorted or has an open circuit. The moisture sensor consists of two metal bars inside the drum that detect the moisture level of clothing by measuring electrical conductivity. When this sensor fails, the dryer cannot accurately determine when clothes are dry, leading to over-drying or under-drying.
Alternate codes: F3E5
Step-by-step fix
4 stepsClean the moisture sensor bars
Locate the two metal sensor bars inside the dryer drum (usually near the lint filter housing). Clean them with fine sandpaper or a cloth dampened with rubbing alcohol to remove dryer sheet residue buildup.
Fabric softener and dryer sheet residue is the number one cause of moisture sensor issues — it coats the bars and prevents proper contact.
Test the sensor with a multimeter
Unplug the dryer. Access the wires connected to the moisture sensor bars from behind the front panel. Disconnect them and test for continuity between the sensor bar terminals. You should get an open reading when dry and some resistance when wet.
Touch a damp cloth across both bars simultaneously — the resistance should change from open to a measurable reading.
Check the wiring to the sensor
Inspect the wire harness from the sensor to the main control board. Look for frayed, pinched, or disconnected wires, especially near the drum opening where wires can be damaged by the door.
The vibration of the dryer drum can cause wires near the front panel to chafe against sharp edges.
Replace the moisture sensor
If the sensor tests faulty or the bars are corroded beyond cleaning, replace the moisture sensor assembly. Remove the mounting screws, disconnect the wires, and install the new sensor.
Switch to liquid fabric softener instead of dryer sheets to reduce future sensor buildup.
When to call a professional
If the sensor and wiring test good but the code persists, the analog-to-digital converter on the main control board may be faulty, requiring professional diagnosis.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
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