Whirlpool · Dryer Moderate
F29 — Moisture Sensor Short
The moisture sensor circuit is shorted — the control sees zero resistance across the two sensor strips even with no laundry present. Auto-dry cycles will not work correctly.
- Keep using it?
- Yes, with caution
- DIY difficulty
- Moderate
- Verified against
- atoz1.com ↗
How to fix it
- Open the dryer door and locate the two metal strips inside the drum near the lint screen opening.
- Wipe both strips thoroughly with rubbing alcohol on a microfiber cloth — this fixes a high percentage of F29 cases.
- Reduce or eliminate dryer sheets for several cycles.
- If the code returns, unplug the dryer and access the sensor harness from the front panel.
- Inspect for two wires that have rubbed through insulation and are touching; repair or replace the harness.
- Measure across the sensor strips with the harness disconnected — should read open (OL); a low or 0 reading confirms a short.
Why it happens
Typical signs: F29 on display · Auto-Dry cycle ends within a minute of starting · Wet clothes never dry on sensor cycles · Beeping at end of a too-short cycle
- Excess fabric softener buildup A conductive film of dryer-sheet residue or softener across the two sensor strips creates a short.
- Wires touching The two sensor wires are pinched together behind the drum front.
- Failed sensor harness Internal short in the harness assembly.
Parts you may need
If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.
- Whirlpool Dryer Moisture Sensor Harness Common replacementAmazon →
More Whirlpool dryer codes
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: atoz1.com.