Amana dryer moisture sensor bars
Price the sensor bars if automatic cycles stop early or F3 E1 returns after cleaning residue from the bars.
$12-$35
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F3 E1 on an Amana dryer points to a sensor circuit fault. On many Whirlpool-built Amana dryers, the control uses the moisture sensor bars and exhaust temperature sensor to decide how long to run and how much heat to apply. If the control sees an open, shorted, or dirty sensor circuit, it can stop the cycle and show F3 E1.
Treat this as an airflow and sensor check first. A clogged vent can make the dryer run hot enough to trigger sensor complaints, and residue on the moisture bars can confuse automatic cycles.
Quick Checks
| Check | What to look for | What it means |
|---|---|---|
| Lint screen | Heavy lint or fabric softener film | Clean before testing again |
| Outside vent | Weak airflow while running | Clear the duct before buying parts |
| Moisture bars | Dryer sheet residue or loose wires | Clean bars and inspect wiring |
| Thermistor | Open or shorted reading | Replace the thermistor |
| Harness | Loose connector at sensor or board | Reseat before replacing parts |
Fix F3 E1
- Unplug the dryer. Do not work around the heater housing or control panel with power connected.
- Clean the lint screen with warm water and a soft brush. Dryer sheet residue can block airflow through the screen.
- Check airflow at the outside vent. If air barely moves, disconnect and clean the exhaust duct before replacing any sensor.
- Wipe the moisture sensor bars inside the drum with rubbing alcohol on a cloth. The bars usually sit near the lint screen housing.
- Inspect the wiring harness from the sensor bars to the control area. Look for loose connectors, pinched wires, corrosion, or a broken spade terminal.
- Test the thermistor if the fault appears during heated cycles. Compare resistance to the service sheet for your exact model.
- Replace the failed sensor part only after cleaning and wiring checks. If F3 E1 returns with good sensors and wiring, the main control board may need diagnosis.
When the Dryer Also Takes Too Long
Slow drying changes the order of the repair. Clear the vent first, then test sensors. Restricted airflow overheats the cabinet, trips thermostats, and can make a good thermistor look suspicious.
Do not bypass the thermal fuse, high-limit thermostat, or thermistor. Those parts keep the dryer from overheating.