Dryers

Door not closed

Door not properly closed or door switch issue.

Lint filter blocked

Lint filter blocked.

Lint filter / main board relay (page lists both)

Bosch page lists E02 both for blocked lint filter and for a main board relay fault.

Condensate drain hose blocked

Drain hose blocked or kinked.

Overload

Usually caused by overloading.

Electronic fault

Electronic fault group.

Limescale in heat pump

Limescale build-up in the heat pump.

Maximum dry time exceeded

Drying took longer than the board allows.

Door opened during cycle

Door was opened during drying.

Dispenser fault

Dispenser fault.

Heating element failure

Heating element failed.

Outlet (exhaust) thermistor

Exhaust thermistor reads abnormal; dryer falls back to timed drying.

Inlet thermistor

Inlet thermistor failed.

Motor relay fault

Motor relay stuck or open; control cannot switch the motor correctly.

Motor fault / low motor voltage / no motor feedback

E52 motor stopped or not starting; E53 low voltage read from motor; E54 no motor feedback.

Heater relay fault

Heater relay circuit faulty: cannot power the element or stuck closed.

Heater circuit open

The control detects the heater circuit as open: the drum turns but no heat is produced.

High-limit tripping repeatedly

High-limit thermostat has opened too often: recurring overheating.

Thermal limiter open (per one source)

One service-code list says the thermal limiter circuit is open; another source ties E66 to the heater relay.

Heater sensing fault

Sources disagree: one lists a heater-sensing failure on the main board, another a tripped inlet thermal limiter or heater wiring fault.

Stuck key

A control panel key reads as stuck.

Temperature probe fault

Temperature probe or sensor problem.

UI to main board communication

Communication error between boards.

Configuration error

Board configuration does not match the model.

Supply voltage error

Abnormal line voltage.

Exhaust flow restriction

Restricted exhaust airflow; fire-safety warning.

Check exhaust alarm / warning

Listed as exhaust alarm (EF1) and warning (EF4), pointing to vent restriction or a faulty high-limit thermostat.

Heater circuit fault

Abnormal heater circuit condition such as ground fault or overcurrent.

Vent blockage

Listed as duct or vent blockage; the dryer keeps running.

Lint filter compartment open

Lint filter not fully seated or compartment unlatched.

Door circuit fault

The control does not see a valid door-closed signal.

Thermistor circuit fault

The temperature thermistor circuit reads open or shorted. Sources disagree on which number is open vs. short and inlet vs. outlet, so confirm on the model's service sheet.

Lint filter alert

Maintenance reminder.

Control lock

Controls locked.

Power failure

Power dropped while the dryer was running.

Steam water supply

Steam feeder empty or not closed.

Compressor restart failure

Compressor failed to restart.

Exhaust restriction level

The exhaust duct is restricted by roughly the percentage shown. On gas models d80 can also show when gas supply is low.

Door not detected closed

The control sees the door as open.

Temporary dry function error

Temporary drying fault.

Steam water supply problem

Water supply for steam cycles not reaching the unit.

Condensate drain

Drain hose kinked, crushed, clogged or sump water frozen.

EEPROM error

Control memory abnormal.

Lint filter not seated

Lint filter not fully inserted; dryer stops.

No gas supply detected

The gas dryer is not getting gas or not establishing flame.

Humidity (moisture) sensor fault

The moisture sensor is not reading properly; the dryer may fall back to a long fixed run (about 2.5 hours per LG).

Motor locked / restricted

Listed in a service-code reference as the drum motor being bound or locked; not found on LG's consumer page.

Motor restricted / low current

LE1 restricted motor; LE2 low current.

Control-to-Wi-Fi module link

Communication problem between the control panel and the Wi-Fi module (per LG and a repair site). One parts site lists a vibration-sensor error instead; confirm by model.

Wi-Fi module problem

Wi-Fi module problem or product not registered.

No current at heater

The dryer runs but detects no current through the heater circuit, usually pointing to the home supply.

Condensate drain error

Condensate pump/drain fault.

Power failure

Power was interrupted, typically after an outage.

Power cord / supply wiring fault

Improper voltage at the power cord, often from a miswired terminal block (white and red swapped) or incorrect house supply.

Thermistor fault

A problem was detected in the dryer's thermistor circuit.

Thermistor fault (cold conditions)

Thermistor error usually tied to a cold duct, for example during steam cycles or with a cold/icy vent.

Thermistor fault (high-temperature sensor)

Thermistor circuit problem; one service-code list describes it as the high-temperature thermistor reading open.

Thermistor out of range (steam generator)

Thermistor reading out of range; parts list ties it to the steam generator thermistor.

Clean airways message

Display message asking to clean the airways (filters); may show with Laundry damp.

Drum rotation sensor

Drum rotation not sensed.

Condenser fan error

Condenser fan not running correctly.

Electronic fault

Internal board error.

EEPROM / communication bus

Memory or internal bus fault.

Motor error

Drum motor failed or uncontrolled.

Airflow blocked

Restricted airflow; laundry not drying.

Temperature sensor

NTC reading out of range.

Door switch

Door not detected closed.

Condensate tank / float

Tank full or float switch fault.

Heat-pump compressor error

Compressor failed or outside limits.

Condensate pump error

Condensate pump fault.

Drum motor fault

The control reports a drum motor problem (motor not turning the drum or its relay circuit); Samsung itself only says to restart and call service.

Condensate drain / water tank

Drain pump or drain path problem, frozen drain hose, or full water tank.

Abnormal supply voltage

The control detected supply voltage outside its expected range.

Main to inverter board communication

Main and inverter boards are not communicating.

Board communication fault

Two internal boards (for example main board and display board) are not talking to each other.

Stuck button

A control button reads as pressed for too long (typically 30 seconds or more).

Laundry in drum during vent test

Vent test found laundry in the drum.

Vent blockage warning

The dryer estimates the exhaust is restricted: C8/C80 about 80 percent, C9/C90 more than 90 percent; Clg means clogged after the vent test.

Child Lock on

Control buttons disabled; on some models door locked.

Room temperature out of range

The dryer's surroundings are below freezing or above about 104 F.

Door / door switch fault

The control is not getting a valid door-closed signal, or the door sensing circuit has an open connection.

Firmware download

Firmware downloading; do not unplug. Service if it lasts over 24 h.

Dry time / over-dry condition

Sources disagree: one describes the drying time exceeding its limit, another describes the moisture sensor calling the load dry too early.

Power frequency fault

The control sees an invalid supply frequency or an abnormal power condition.

Clean heat exchanger

Heat exchanger needs cleaning (buzzer sounds).

Gas ignition error

Burner failed to ignite.

Heating / overheat fault

The control saw an abnormal heating condition, usually exhaust temperature running too high, and in some cases heat not behaving as expected. On gas models a supply problem can also bring this up.

Lint filter problem

Lint filter assembly not detected or problem with it.

Heat exchanger cover problem

Internal heat exchanger cover not detected correctly.

Compressor temperature sensor

Compressor temperature sensor problem.

Temperature sensor (thermistor) fault

The thermistor reading is outside its valid range. On many models tO points to an open sensor circuit and tS to a shorted one.

Open thermistor

The temperature sensor circuit reads open (no signal).

Shorted thermistor

The temperature sensor circuit reads abnormally low resistance (shorted).

Restricted airflow

The lint screen or vent is clogged, or the vent is crushed, kinked or has too many turns. The dryer keeps running; any key clears the message.

Machine control fault

A fault inside the machine control electronics; one tech-sheet-based source ties it to the motor relay circuit on the control.

Main control fault

The main control board has detected an internal failure (one repair reference ties it to a stuck motor relay on the board). Whirlpool only gives reset steps.

Keypad / stuck key

The control sees a keypad problem, usually a stuck key.

Exhaust thermistor open or shorted

The exhaust thermistor circuit reads open or shorted.

Moisture sensor fault

The moisture sensor has not registered data for several consecutive loads (Whirlpool says five), or the sensor circuit is open/shorted.

Inlet thermistor fault

The inlet (heater-side) thermistor circuit reads out of range.

Heater or heater relay fault

The control suspects a problem with the heater or the heater relays.

Low or no line voltage

Per Whirlpool, the control sees low or no voltage on the second 240 V leg, so the heater cannot run; the drum may still tumble with no heat.

Communication error

The main control and the user interface are not communicating.

Dryer fan fault

Dryer fan problem.

Compressor fault

Dryer compressor problem.

Water tank full

Condensate water tank is full.

Exhaust thermistor open

The exhaust (outlet) thermistor circuit is open.

Exhaust thermistor shorted

The exhaust (outlet) thermistor circuit reads shorted.

Meaning varies by platform

Sources disagree: one service manual reference ties it to the UI being unable to read its memory (EEPROM), others to the drive motor/relay or the moisture sensor. Check the tech sheet behind the console.

L2 low line voltage

Low or missing line voltage on one leg; the heater will not come on.

Low or no line voltage

Supply voltage is too low for the heater; the dryer may tumble but not heat. Often only one 240 V leg is reaching the unit.

Power failure

Power was interrupted during a cycle. Informational.