Electrolux Air Conditioner Error Code F1

F1 on an Electrolux air conditioner indicates that the indoor ambient temperature sensor has been detected as open or short circuited. The mainboard monitors the resistance signal from this NTC thermistor to read room temperature. When the signal falls outside the expected range, the unit stops normal operation and displays F1. The fault can originate at the sensor itself, its wiring, or the connector terminal on the mainboard.

Running the unit while the F1 code is active is not recommended. The air conditioner cannot properly regulate its operation without accurate room temperature data, which can lead to improper cycling and potential stress on the compressor. Most Electrolux units will restrict or suspend normal operation automatically when F1 is displayed. Addressing the sensor fault before continued use is the safest approach.

A power reset may temporarily clear the F1 code if the fault was caused by a momentary signal issue, but the code will return if the underlying problem with the sensor or its wiring is still present. Resetting the unit does not repair a failed sensor or a damaged connector. Performing the proper resistance test on the sensor after a reset is the only reliable way to confirm whether the fault has been resolved.

Start by checking the wiring terminal that connects the indoor ambient temperature sensor to the mainboard, ensuring the connector is fully seated and free of corrosion. Next, use a multimeter to measure the sensor's resistance and compare the reading against the model's resistance table. If the sensor reads near infinite or near zero ohms, replace the sensor. If the sensor measures correctly, inspect the wire harness for damage and, as a last step, consider the mainboard.

If the fix is simply reseating a loose connector, there may be no parts cost and only a service call fee, which typically ranges from $50 to $100 or more depending on your area. Replacing the indoor ambient temperature sensor is generally inexpensive, with parts commonly ranging from $10 to $40. If the mainboard requires replacement, costs can rise considerably, often falling in the $150 to $400 range for parts alone before labor.