Moisture sensor error — drum moisture sensing bars not responding correctly
The F4E4 error on the Maytag MED5630HW indicates moisture sensor error — drum moisture sensing bars not responding correctly. This typically occurs due to dryer sheet residue coating the moisture sensor bars inside the drum. A qualified technician can usually diagnose this in 15–20 min, but the steps below will help you understand the issue.
Safety Warning
This repair is recommended for certified technicians only. The diagnostic steps below can help you understand the issue before calling for service.
Common Causes of F4E4
- 1Dryer sheet residue coating the moisture sensor bars inside the drum
- 2Damaged moisture sensor strips unable to detect fabric conductivity
- 3Wiring harness from moisture sensor to control board disconnected
- 4Control board moisture sensor circuit failure
How to Fix F4E4
- 1
Step 1
Cancel the cycle and unplug the dryer from the wall outlet
- 2
Step 2
Locate the two metal moisture sensor bars inside the drum near the lint trap opening
- 3
Step 3
Dampen a cloth with white vinegar or rubbing alcohol and wipe the sensor bars firmly
- 4
Step 4
Allow the sensor area to dry completely for 5 minutes before restoring power
- 5
Step 5
Plug in the dryer and run a load of damp laundry on an automatic dry cycle to test sensor response
- 6
Step 6
If F4E4 returns after cleaning, the sensor or its wiring needs professional diagnosis
Tools Needed
When to Call a Technician
Sensor bars appear clean and error persists — moisture sensor wiring or control board circuit needs professional diagnosis
Frequently Asked Questions
Common questions about Maytag F4E4 error
The F4E4 error on the Maytag MED5630HW means the moisture sensor inside the drum is not functioning correctly. The moisture sensor is a pair of metal strips that measure how conductive the laundry is — wet fabric conducts electricity while dry fabric does not. Dryer sheet residue coats the bars and is the most common cause of this error.
The moisture sensor bars are located inside the drum, typically near the lint trap area. Wipe them with a cloth dampened in white vinegar or rubbing alcohol — the acid in vinegar dissolves dryer sheet wax buildup effectively. Do this cleaning every 3 to 6 months as a preventive step, especially if you use dryer sheets regularly.
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