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Error code reference

Electrolux Air Conditioner Error Code F2

Indoor evaporator (tube) temperature sensor open or short circuited.

Electrolux codesElectrolux air conditioner codes

Indoor evaporator (tube) temperature sensor open or short circuited.

First step from the service manual

Check wiring terminal connection between tube sensor and mainboard; verify sensor resistance against resistance table.

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

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What F2 means on a Electrolux air conditioner

The F2 error code on an Electrolux air conditioner indicates a fault in the indoor evaporator tube temperature sensor, also called the pipe sensor or coil sensor. This sensor is a negative temperature coefficient (NTC) thermistor mounted directly on the evaporator coil tubing. It continuously monitors refrigerant-side temperatures to give the mainboard accurate data for controlling compressor operation, preventing coil icing, and managing heating/cooling cycles. When the mainboard detects that the sensor circuit is either open (infinite resistance, indicating a broken wire or failed sensor) or short circuited (near-zero resistance, indicating an internal sensor failure or wiring fault), it immediately triggers the F2 code and typically halts normal operation.

The most direct diagnostic approach involves two steps: first, inspecting the physical wiring connection between the tube sensor and its terminal on the mainboard, and second, measuring the sensor's resistance with a multimeter and comparing it against the resistance-temperature table specified for that sensor. A healthy NTC thermistor will show a predictable, decreasing resistance as temperature rises. A reading of zero ohms or infinite resistance confirms sensor or wiring failure. Corroded terminals, cracked sensor housings, or pinched wiring harnesses are common causes of intermittent or permanent faults that trigger this code.

Source: manufacturer service documentation.

Common causes of F2

  1. 01

    Loose or corroded wiring terminal at the mainboard

    Wiring / connection

    The connector between the tube sensor wiring harness and the mainboard can work loose over time or develop corrosion, creating an open circuit. Inspect the terminal block for oxidation, bent pins, or a partially unseated plug.

  2. 02

    Failed NTC thermistor sensor

    Part replacement

    The sensor itself can fail internally, resulting in an open or shorted resistance reading that falls outside the expected range on the resistance table. Measuring the sensor's resistance across its two leads and comparing it to the specified table will confirm this failure.

  3. 03

    Damaged or pinched sensor wiring

    Part replacement

    The wiring between the tube sensor and the mainboard can be pinched by panels, abraded by sharp edges, or cracked from repeated vibration. Visually trace the full length of the wiring harness for any signs of damage.

  4. 04

    Moisture or condensation intrusion at the sensor connector

    Wiring / connection

    Water from condensation can wick into the sensor connector, causing a short circuit between the terminals. Look for discoloration, mineral deposits, or visible moisture at the connector and sensor body.

  5. 05

    Mainboard fault affecting the sensor input circuit

    Part replacement

    If the sensor and all wiring test within spec but the F2 code persists, the sensor input circuit on the mainboard itself may be damaged. This is less common but should be considered after all other causes are ruled out.

See the test procedure for each cause

Frequently asked questions about F2

What does F2 mean on a Electrolux air_conditioner?
F2 on an Electrolux air conditioner indicates that the indoor evaporator tube temperature sensor has been detected as open or short circuited. This sensor sits on the evaporator coil and feeds temperature data to the mainboard. When the circuit fails, the unit cannot safely regulate cooling or heating cycles and will stop normal operation until the fault is resolved.
Can I fix an F2 error on my Electrolux air conditioner myself?
A knowledgeable DIYer can start by checking that the sensor connector is fully seated at the mainboard and that the wiring is undamaged. If the connection looks good, testing the sensor resistance with a multimeter and comparing it to the resistance table for that sensor will confirm whether the sensor has failed. Replacing the tube sensor is a moderate-difficulty repair, but if the mainboard itself is suspected, professional diagnosis is recommended.
Is it safe to keep running my air conditioner with an F2 error?
You should not continue running the unit with an active F2 error. Without a functioning evaporator tube sensor, the mainboard cannot accurately monitor coil temperatures, which can lead to coil icing, compressor overloading, or other secondary damage. Addressing the fault promptly will prevent more costly repairs.
How much does it cost to repair an F2 error on an Electrolux air conditioner?
If only the wiring connection needs reseating or cleaning, the repair may cost little to nothing beyond a service call fee, which typically ranges from $60 to $120. Replacing the tube temperature sensor itself usually costs between $20 and $80 for the part, plus labor. If the mainboard requires replacement, total costs can range from $200 to $500 or more depending on the model and local labor rates.
Will resetting my Electrolux air conditioner clear the F2 error?
A power reset may temporarily clear the F2 code if the fault was caused by a transient issue such as a momentarily loose connector, but the code will return if the underlying problem is not resolved. If the sensor has failed or wiring is damaged, the error will reappear as soon as the unit attempts to read the sensor during normal operation. A reset is useful for confirming whether the fault is intermittent, but it is not a repair.

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