Amana Dryer F29 Error Code — What It Means
The F29 error on your Amana dryer points to a problem in the moisture sensor circuit. This circuit monitors the dampness of clothes during automatic cycles. The moisture sensor bars, located near the lint screen or inside the drum opening, detect water in the fabric and tell the control board when to stop the cycle. When the board sees a short, open, or erratic signal from this circuit, it throws F29 and halts the dryer.
Because Amana dryers share platform architecture with Whirlpool, Whirlpool’s published F29 guidance confirms this is not a simple airflow or lint reminder. It is an electrical fault in the moisture-sensing path. Most often the sensor bars are coated with detergent film or fabric-softener residue, which blocks the electrical signal. Less commonly, a connector has worked loose or the harness has chafed through.
Common Causes
- Dirty or coated moisture sensor bars Detergent, fabric softener, and mineral deposits insulate the electrodes so the circuit cannot read moisture correctly.
- Loose or corroded sensor harness connector Vibration or heat can back out a plug or corrode pins, breaking the signal path to the control board.
- Damaged or shorted sensor wiring Pinched, abraded, or melted insulation in the harness creates a short or open circuit that triggers the fault.
- Failed moisture sensor electrode assembly Physical cracks, corrosion, or broken solder joints inside the sensor bracket cause intermittent or permanent signal loss.
- Faulty main control board If the sensor path checks good but F29 persists, the control’s moisture-sensing circuit may have failed internally.
- Residual static charge or transient voltage A power surge or static buildup can latch a false fault until the control is fully reset.
Step-by-Step Fix
- Turn off power at the circuit breaker for a full five minutes, then restore power and check whether F29 clears on its own.
- Run a short Timed Dry cycle for about one minute and watch the display to confirm whether the code returns immediately or stays off.
- Locate the moisture sensor bars near the lint-screen opening or just inside the drum, then wipe both metal strips with a soft cloth dampened with rubbing alcohol or mild cleaner to remove film, and dry them completely.
- Unplug the dryer and pull it away from the wall, then remove the top or rear access panel to expose the moisture-sensor harness running from the sensor electrodes to the control board.
- Inspect every connector and wire in the sensor circuit for looseness, bent pins, corrosion, or damaged insulation, and reseat or repair any suspect connections.
- Test the sensor circuit by measuring continuity between the sensor bars with a multimeter (consult your model’s tech sheet for expected values), and verify that the harness has no shorts to ground.
- Replace the failed component (sensor assembly, harness, or control board) if cleaning and wiring checks do not resolve F29, and run a full auto-dry test load to confirm the repair.
Parts Often Needed
| Part | Notes |
|---|---|
| Moisture sensor bar assembly | Amazon | Metal electrode strips mounted near the lint screen or drum opening. |
| Moisture sensor wiring harness | Amazon | Replacement lead set if wires are chafed, melted, or shorted. |
| Main control board (dryer electronic control) | Amazon | Required if the sensor path tests good but F29 will not clear. |
When to Call a Pro
Call a qualified appliance technician if cleaning the sensor bars and reseating connectors does not clear F29, or if you are uncomfortable working behind live control boards. Diagnosing a persistent F29 requires a multimeter, a wiring diagram, and familiarity with low-voltage sensing circuits. A pro can quickly isolate whether the fault lies in the sensor, harness, or control board and can source the correct OEM part for your Amana model. Also call for help if you discover scorched wiring, a burnt smell, or any sign of arcing, since those conditions point to a short that must be corrected before the dryer is safe to operate.