Whirlpool's electronic dryers report faults with a two-part code such as F3 E1 or F4 E1. The same system is used across the brands Whirlpool builds, so the codes below also apply to many Maytag, Amana, Inglis, KitchenAid and Whirlpool-built Kenmore dryers. Once you know how to read the format, the code tells you a surprising amount about where the problem sits.
Here is how the codes are structured, what the most common sensor, heater and airflow codes mean, which ones you can deal with safely yourself, and which need a technician with a meter.
How Whirlpool F-codes work
The F number tells you which system has the problem, and the E number narrows it down within that system. F3 codes relate to sensors, F4 codes to the heater and its supply, F6 to communication between boards, and F7 to the motor. On many models the code shows as F3, then E1, flashing one after the other. Some models need you to enter a diagnostic mode to see stored codes, while others show the code right away.
Many models also keep a short history of recent codes. A technician can read that history in service mode, which helps when a fault comes and goes and the display looks normal by the time anyone checks. If your dryer showed a code once and then carried on, note it down along with what the dryer was doing at the time.
Codes can vary a little between models and production years, so always check your owner's manual or our Whirlpool dryer codes section against your model number.
Sensor codes: F3 E1, F3 E2 and F3 E3
F3 E1: exhaust thermistor fault
The exhaust thermistor reads the temperature of the air leaving the drum, and the control uses it to switch the heat on and off. F3 E1 means the control is getting a bad reading from it. The usual cause is a failed exhaust thermistor or a fault in its wiring. Because the control relies on this reading to manage heat, a dryer with a faulty exhaust thermistor may stop heating, cut cycles short or refuse to run sensor cycles. It is not a DIY fix, but it is a common and straightforward repair once the part is tested.
F3 E2: no moisture sensor reading
F3 E2 means five loads were dried with no moisture-sensor reading. Before calling, check that the dryer is level, avoid very small loads on sensor cycles (a single shirt rarely touches the sensor bars often enough to give a reading), and clean the sensor bars with rubbing alcohol. Our moisture sensor cleaning guide shows how. If the code returns after that, the sensor itself may have failed.
F3 E3: inlet thermistor fault
F3 E3 is the partner to F3 E1. It points to the inlet thermistor, which reads air temperature as it enters the drum, or to its wiring. Like F3 E1, it needs testing with a meter.
Heater and power codes
F4 E1: heater system fault
F4 E1 points to the heater system. The cause is usually the heating element or the heater relays on the control board. You will often notice little or no heat along with the code. Before booking, confirm the breaker has not tripped, because a supply problem can look similar; F4 E4 is the code for that. Our dryer not heating page explains what a repair involves, and our post on signs of a bad heating element covers the other clues.
F4 E4 and L2: low voltage to the heater
F4 E4 means low or no line voltage to the heater. Common causes are a tripped breaker, loose cord terminal screws, or a problem with the home's power supply. On some models the related L2 code means low or no line voltage, so the heater may not turn on. These codes often follow a power outage or work in the electrical panel.
AF or Check Vent (F4 E3)
The Check Vent light, shown on some models as AF or F4 E3, means airflow through the dryer is restricted. The dryer keeps running, but it dries slowly and runs hot, which is hard on the thermal fuse. The usual cause is a clogged lint screen or vent, or a crushed or kinked vent hose. If the outside run is the problem, our dryer vent cleaning service clears it from end to end.
Quick code reference
| Code | Meaning | DIY or technician |
|---|---|---|
| F3 E1 | Exhaust thermistor fault | Technician |
| F3 E2 | No moisture-sensor reading | DIY first: level and clean sensor |
| F3 E3 | Inlet thermistor fault | Technician |
| F4 E1 | Heater system fault | Technician |
| F4 E3 / AF | Airflow restricted | DIY first: lint screen and vent |
| F4 E4 | Low voltage to heater | DIY breaker check, then technician |
| F6 E1 | Boards not communicating | Technician |
| F7 E1 | Motor system fault | Technician |
You may also see PF, which means a power failure interrupted the cycle; press start to carry on. The F2 family relates to the keypad and user interface, often a stuck key. F6 E1 and F7 E1 are less common but more serious: the first means the control boards are not communicating, and the second is a motor system fault involving the drive motor, motor control or wiring.
Safe checks before you call
Unplug the dryer, or turn off its breaker, before touching anything behind it or inside the cabinet.
- For Check Vent: clean the lint screen, straighten the duct behind the dryer, and check for strong airflow at the outside hood. Clear any snow or lint from the flap.
- For F4 E4 or L2: check your electrical panel. Electric dryers use a double breaker. If it has tripped, switch it fully off, then back on. If it trips again, stop and call. Leave terminal block wiring to a technician or electrician.
- For F3 E2: level the dryer and clean the sensor bars.
- For any code: unplug the dryer for a few minutes to reset it, then run a short timed cycle. If the code returns right away, the part needs testing.
Never jump a thermal fuse or bypass a sensor to clear a code. On gas models, do not open gas parts. Anyone who smells gas should leave the home first and then call ATCO Gas emergency at 1-800-511-3447.
Brands that share these codes
Because Whirlpool builds several brands, the same codes turn up on many dryers in Calgary homes. Our Maytag codes section and Kenmore codes section include model notes, and Amana, Inglis and KitchenAid follow the same pattern. Not every Kenmore is Whirlpool-built, so check the model number first, or use our all-brand dryer error code page if you are unsure who made yours.
Older dryers from these brands that use a mechanical timer instead of an electronic control will not show F-codes at all. On those models, a no-heat or no-start fault is found by testing parts directly.
When to call a technician
Codes such as F3 E1, F3 E3, F4 E1 and a repeated F4 E4 need a technician to test the thermistors, heater circuit and control board, since replacing parts on a guess wastes time and money. Fast Appliance Repair works on Whirlpool, Maytag, Amana, Inglis, KitchenAid and Kenmore dryers across Calgary, Chestermere, Strathmore and nearby towns, with same-day service when available. You pay a flat diagnostic fee, get a full quote before any work, and every repair includes a 90-day parts and labour warranty. Call (587) 779-6919 to book.