Whirlpool Dryer F3E3 error code
F3E3 means the inlet thermistor (the temperature sensor near the heater) is open. The control cannot read incoming air temperature, so it stops heating. Whirlpool found a blocked vent is the most common cause.
Also shown as: F3E3, F3 E3, F24
Last updated: October 6, 2026
What causes the F3E3 error?
- Blocked or restricted dryer vent (most common cause per Whirlpool service pointer)
- Open or shorted inlet thermistor
- Loose connection at the main control (ACU), especially the inlet thermistor wire
- Heat damage to the sensor from a long-restricted vent
How to fix Whirlpool F3E3 — step by step
Work through these in order, from simplest and safest first. Stop as soon as the code clears.
- Clean the lint screen and vent
Clean the lint screen, then check the duct behind the dryer for kinks and the outside vent hood for lint. Whirlpool's own service pointer says a blocked vent is the most common cause of F3E3, so do this first. - Power-reset the dryer
Unplug the dryer for 5 minutes and plug it back in. If the code was a one-time sensor glitch, it may clear and the cycle may run normally. - Check the sensor connection (advanced)
With the dryer unplugged, check that the inlet thermistor wire is firmly plugged into the main control board and the sensor connector is seated. Look for loose or corroded pins. If connections are good, the thermistor itself usually needs replacing.Safety warning: Always unplug the dryer before removing panels. Do not probe live wiring.
When to call a technician
- F3E3 returns after vent cleaning and a reset
- The sensor connector or control-board pins are burnt or damaged
- The dryer has repeated overheating or blown thermal fuses
- You are not comfortable removing panels or checking connections
Frequently asked questions
Why does Whirlpool blame the vent for a sensor error?
A blocked vent traps heat around the heater and inlet sensor. The repeated overheating cooks the thermistor until it fails open — so the vent is often the root cause, not just the sensor.
Where is the inlet thermistor?
Near the heating element housing, upstream of the drum. On many models it is reached from the rear panel.
The code came back right after I replaced the sensor. Why?
The vent restriction that killed the first sensor is probably still there. Clean the full vent run before condemning the new sensor.
Sources
Every meaning and fix above was checked against official manufacturer documentation:
FixCode provides general troubleshooting information only — not professional repair advice. If you are unsure about any step, stop and call a qualified technician. Repairs done incorrectly can be dangerous and may void your warranty.