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Error code reference

Electrolux Washer Error Code E73

Fault in NTC sensor on drying duct (voltage out of range = short-circuit or open circuit)

Electrolux codesElectrolux washer codes

Fault in NTC sensor on drying duct (voltage out of range = short-circuit or open circuit) - drying NTC sensor defective, wiring defective, or main circuit board defective.

First step from the service manual

Check drying NTC sensor (duct); check wiring; check main circuit board.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What E73 means on a Electrolux washer

The E73 error code on an Electrolux washer indicates a fault in the NTC (Negative Temperature Coefficient) sensor located on the drying duct. This sensor monitors temperature during the drying cycle by varying its electrical resistance in response to heat. When the control board detects a voltage signal from this sensor that falls outside the expected operating range, it triggers E73 and halts the drying function. The fault condition covers two failure modes: a short circuit, where resistance drops abnormally low and voltage collapses, and an open circuit, where the sensor circuit is broken and the board receives no signal at all.

The drying duct NTC sensor is a critical safety and performance component in washer-dryer combo units. It allows the main circuit board to regulate drying temperatures and prevent overheating. When it fails or its wiring is compromised, the board cannot confirm safe operating temperatures and will not permit the drying cycle to run. A defective sensor is the most common cause, but damaged wiring between the sensor and the control board, including broken connector pins or chafed wire insulation, can produce identical fault behavior.

Diagnosing E73 requires checking the sensor itself, the wiring harness connecting it to the main board, and finally the main circuit board if the other components test within specification. Use a multimeter to verify sensor resistance changes with temperature and that continuity is present throughout the wiring path. If the sensor and wiring are both confirmed good, a faulty main circuit board may be misreading the voltage signal, though board faults are the least common cause of this code.

Source: manufacturer service documentation.

Common causes of E73

  1. 01

    Defective drying NTC sensor

    Part replacement

    The NTC sensor itself has failed, either internally short-circuited or open-circuited, causing it to send a voltage reading outside the acceptable range to the control board. Testing with a multimeter should reveal incorrect or no resistance variation with temperature changes.

  2. 02

    Damaged or disconnected wiring harness

    Wiring / connection

    The wiring between the drying duct NTC sensor and the main circuit board may have a broken connector, corroded terminal, or chafed wire causing an open or short circuit. Inspect the harness routing for visible damage and check connector seating at both ends.

  3. 03

    Loose or corroded connector at the sensor

    Wiring / connection

    Vibration during cycles can loosen the connector at the sensor itself, intermittently breaking the circuit. Reseating or cleaning the connector pins may resolve the fault if no permanent damage is present.

  4. 04

    Faulty main circuit board

    Part replacement

    If the sensor and all wiring test correctly, the main circuit board may be failing to read or process the voltage signal from the NTC sensor accurately. This is the least common cause and should only be suspected after all other components are ruled out.

See the test procedure for each cause

Frequently asked questions about E73

What does E73 mean on a Electrolux washer?
E73 indicates a fault in the NTC temperature sensor located on the drying duct. The control board has detected a voltage from this sensor that is out of the expected range, pointing to either a short circuit or an open circuit condition. This could be caused by a defective sensor, damaged wiring, or a faulty main circuit board. The drying cycle will not operate while this fault is active.
Can I fix E73 on my Electrolux washer myself?
A knowledgeable DIYer can start by inspecting the wiring harness and connectors leading to the drying duct NTC sensor, as loose or disconnected wires are sometimes the cause and require no replacement parts. If the sensor itself has failed, it can be replaced with the correct part. However, if the main circuit board is at fault, repair becomes more complex and a qualified technician is recommended.
Will resetting my Electrolux washer clear the E73 error?
Resetting the washer by unplugging it for a few minutes may temporarily clear the code, but if the underlying fault in the NTC sensor or wiring is still present, E73 will return when the drying cycle is attempted again. A reset is not a fix and the root cause must be properly diagnosed and repaired for the code to stay cleared.
Is it safe to use my Electrolux washer while E73 is displayed?
The washing functions of the machine may still operate normally while E73 is active, since this fault is specific to the drying duct temperature sensor. However, you should avoid using the drying cycle, as the control board cannot properly monitor drying temperatures without a functioning NTC sensor, which poses a potential overheating risk.
How much does it cost to repair an E73 error on an Electrolux washer?
If the drying NTC sensor needs replacement, parts and labor typically range from around $75 to $200 depending on your location and the service provider. Wiring repairs or connector replacements are generally on the lower end of that range. A main circuit board replacement is significantly more expensive, often ranging from $200 to $500 or more including labor.

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