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Error code reference

Whirlpool Dryer Error Code F:29

Moisture sensor strip has shorted; this fault code will ONLY appear when in the diagnostic test mode.

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Moisture sensor strip has shorted; this fault code will ONLY appear when in the diagnostic test mode.

First step from the service manual

See TEST #5, page 11.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What F:29 means on a Whirlpool dryer

The F:29 error code on a Whirlpool dryer indicates a shorted moisture sensor strip. The moisture sensor system consists of two metal sensor bars located inside the drum, typically near the lint screen housing. As clothes tumble during a drying cycle, they contact these bars and the dryer measures the electrical conductivity between them to estimate remaining moisture levels. A short circuit in this circuit means current is flowing where it should not be, causing the control board to flag the fault.

A short in the moisture sensor strip circuit can result from physical damage to the sensor bars, a pinched or melted wire harness connection, or contamination such as fabric softener residue or detergent buildup bridging the two sensor bars and creating an unintended conductive path. Corrosion or debris accumulation on the sensor bars themselves can also trigger this condition. Because the fault involves a short rather than an open circuit, resistance readings across the sensor circuit will be abnormally low when tested with a multimeter.

Importantly, F:29 will only appear during the dryer's diagnostic test mode. It will not display during a normal drying cycle, which means a technician must deliberately enter diagnostic mode to surface this code. The recommended starting point for diagnosis is Test 5, which walks through the moisture sensor circuit systematically to isolate whether the fault lies in the sensor bars themselves, the wiring harness, or the connections at the control board.

Source: manufacturer service documentation.

Common causes of F:29

  1. 01

    Residue buildup on sensor bars

    Wiring / connection

    Fabric softener, dryer sheet coating, or detergent residue can accumulate on the sensor bars and create a conductive bridge between them, simulating a short. Clean the bars with rubbing alcohol and a soft cloth to check if this resolves the fault.

  2. 02

    Damaged or shorted wiring harness

    Part replacement

    The wiring between the sensor bars and the control board can become pinched, melted from heat exposure, or chafed against the drum or cabinet, causing a short circuit. Inspect the full length of the harness for visible damage or insulation wear.

  3. 03

    Failed moisture sensor strip

    Part replacement

    The sensor bars themselves can crack, corrode, or suffer internal failure that results in a short condition. A multimeter reading showing near-zero resistance across the sensor bars when no load is present confirms the bars need replacement.

  4. 04

    Faulty connector or terminal at control board

    Wiring / connection

    Corroded, loose, or damaged connector pins at the control board end of the sensor circuit can create unintended electrical continuity. Inspect the connector for bent pins, corrosion, or melted plastic around the terminals.

  5. 05

    Control board fault

    Part replacement

    If the sensor circuit and wiring test correctly but the fault persists, the control board's moisture sensor input circuit may have failed internally. This is the least common cause and should only be considered after all other components are ruled out.

See the test procedure for each cause

Frequently asked questions about F:29

What does F:29 mean on a Whirlpool dryer?
F:29 means the dryer's moisture sensor strip circuit has detected a short circuit. The moisture sensor bars are located inside the drum and measure conductivity to determine how wet the load is. This code only appears during the dryer's diagnostic test mode, not during a standard drying cycle. A technician must run the diagnostic sequence to bring up this fault.
Can I fix the F:29 error code myself?
Some causes of F:29 are DIY-friendly. Cleaning the sensor bars inside the drum with rubbing alcohol is a good first step and requires no parts or special tools. Inspecting the wiring harness for obvious damage is also within reach for a careful DIYer. However, replacing the sensor strip or the control board involves disassembling the dryer and working near electrical components, which is better suited to someone with appliance repair experience.
Is it safe to use my dryer if it shows an F:29 code?
Because F:29 only appears in diagnostic test mode and not during normal operation, your dryer may still run cycles. However, a shorted moisture sensor means the dryer cannot accurately detect when clothes are dry, which could lead to over-drying, increased energy use, or excessive heat. It is best to address the fault before relying on the dryer for regular use.
How much does it cost to repair a Whirlpool dryer F:29 error?
If the fix is simply cleaning the sensor bars, the cost is minimal, just rubbing alcohol and a few minutes of time. A replacement moisture sensor strip typically runs in the range of $15 to $50 for parts. If the wiring harness or control board needs replacement, total repair costs including labor can range from $100 to $300 or more depending on your location and the specific parts required.
Will resetting the dryer clear the F:29 code?
Resetting the dryer by unplugging it will not permanently clear F:29 because the code only surfaces during diagnostic test mode in the first place. The fault will reappear the next time diagnostics are run if the underlying short circuit has not been repaired. The correct approach is to diagnose and fix the sensor circuit as outlined in Test 5 of the diagnostic procedure.

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