What this code means
The F4E4 code (also labeled L2 Error Code in Whirlpool’s product-help materials) signals an electrical or voltage problem in the dryer’s power supply. The control board is detecting low or missing line voltage, typically on one leg of the 240 V circuit. When this happens, the dryer may tumble normally because the motor runs on 120 V, but the heating element will not energize because it requires the full 240 V across both hot legs.
This is not a thermal fault or an airflow problem. It is a supply-side electrical issue. The dryer itself is usually not at fault—it is simply reporting that the power it is receiving is incomplete or incorrect.
Before You Replace Anything
Homeowners often replace the control board when they see a code, but F4E4 is almost always a supply-power fault. Check voltage at the outlet and breaker first before ordering any electronic parts.
Common Causes
- One tripped breaker pole Electric dryers use two breaker poles to deliver 240 V, and one leg can trip while the other stays closed, leaving the dryer with 120 V for the motor but no heat.
- Loose or damaged terminal-block connection The power cord lands on the dryer’s terminal block, and a loose, burned, or incorrectly installed wire can drop voltage on one leg.
- Faulty power cord A frayed or internally broken three- or four-wire dryer cord can lose continuity on one conductor, cutting voltage in half.
- Bad dryer outlet or house wiring The wall receptacle itself can have a loose connection, worn contact, or damaged wiring, causing intermittent or absent voltage on L2.
- Defective control board or relay If supply voltage is correct at the dryer’s internal feed points, the control board or its power relay can fail and misreport or truly lose voltage sensing.
Step-by-Step Fix
- Turn off the dryer and unplug it if possible, or switch off both breaker poles at the panel to make sure the dryer is de-energized before any inspection.
- Inspect both breaker poles in the electrical panel. A 240 V electric dryer uses two adjacent or stacked breaker handles. Confirm both are firmly in the ON position and neither has tripped to the middle or OFF position. If one is tripped, reset both handles fully OFF then back ON.
- Measure voltage at the wall outlet using a multimeter. Place one probe on each hot slot (the two slanted or horizontal blades) and confirm 240 V. Then measure from each hot to the neutral (center) slot and confirm approximately 120 V on each leg. Low or zero voltage on one leg confirms the supply fault.
- Check the power cord and terminal-block connections at the back of the dryer. Pull the dryer out, remove the rear access panel or terminal-block cover, and inspect each wire landing. Look for char marks, loose screws, or pushed-out wires. Tighten all terminals and verify the cord is installed per the dryer’s wiring diagram.
- Perform a full power reset by leaving the breaker off for at least one minute, then restoring power. Run the dryer on Timed Dry and observe whether the code returns. If the dryer heats normally and the code does not reappear, the fault may have been a transient voltage dip or a poor connection that reseated.
- Retest in a normal dry cycle. If F4E4 returns immediately and you have confirmed correct voltage at the outlet and terminal block, the fault is likely internal to the dryer’s wiring harness or control board. At that point, replace the main control board or call a qualified technician.
- Document your voltage readings and test results. If a service call is needed, this information will help the technician quickly isolate whether the problem is house-side (utility, panel, outlet) or appliance-side (terminal block, harness, board).
Parts Often Needed
| Part | Notes |
|---|---|
| Whirlpool dryer power cord (3-wire or 4-wire) | Amazon | Match the cord configuration to your outlet type. Inspect for internal breaks or burned conductors. |
| Dryer terminal block | Amazon | Replacement terminal block if the existing one is melted, cracked, or has damaged screw posts. |
| Main control board (electronic control) | Amazon | Order by your dryer’s full model number. Replace only after confirming supply voltage is correct and stable at the dryer’s internal feed. |
When to Call a Pro
Call a professional if you are not comfortable working inside your home’s breaker panel, if voltage measurements at the outlet are abnormal and you need house-wiring diagnosis, or if you have verified correct 240 V supply at the terminal block but the F4E4 code persists. A technician can isolate faults in the dryer’s internal harness, test the control board’s power-supply circuit, and safely diagnose any issues in the breaker panel or service entrance. Also call a pro if you see any signs of arcing, melted insulation, or burned terminals, since these indicate a serious electrical hazard that must be corrected before the dryer is used again.