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Error code reference
Frigidaire Air Conditioner Error Codes
48 error codes documented with diagnostic procedures.
Have your model number? Get codes specific to your unit.
ALX-fan function active (indoor fan continues at low speed for 2 min after unit off)ASAmbient thermistor sensor located in front of the evaporator has failed.C5Indoor unit and outdoor unit doesn't match (Protection of Jumper Cap)CSCondenser thermostat sensor has failed (heat pump models only); displays for 1 second…d1DRED1 demand response moded2DRED2 demand response moded3DRED3 demand response modeE2Anti-freezing protectionE3Block or low pressure of refrigerant systemE4Compressor exhaust high temperature protectionE5AC over-current protectionE6Communication failure between indoor unit and outdoor unitE8Anti-high temperature protectionEELoading EEPROM malfunctionESEvaporator thermistor sensor has failed.EUFrequency limiting (module temperature)F0Refrigerant leakage protectionF1Indoor ambient temperature sensor is open or short-circuited.F2Indoor evaporator temperature sensor is open or short-circuited.F3Outdoor ambient sensor open or short circuitF4Outdoor ambient temperature sensor is open or short-circuited.F5Exhaust sensor open or short circuitF6Overload limit / drop frequencyF8Over current limit / drop frequencyF9High exhaust temperature limit / drop frequencyFHAnti-freezing limit / drop frequencyFoRefrigerant recovery mode active (display shows 'Fo' during refrigerant recycling…FPLow temperature prevention protection activated; unit enters pure electric heating mode.H1Defrosting in progressH3Compressor overload protectionH4No feedback of indoor fan motorH5IPM protection / Module temperature is too highH6Jumper cap malfunction protection (Blocked protection of IDU fan motor)HCPFC protectionHSHeat thermistor sensor has failed (heat capable models only).L3Power protectionL9Gathering refrigerantLPOutdoor DC fan motor malfunctionLUFrequency limiting (power)OSOutdoor ambient thermostat sensor has failed (heat pump models only); displays for 1…P0Compressor minimum frequency in test stateP1Compressor rated frequency in test stateP2Compressor maximum frequency in test stateP3Compressor intermediate frequency in test statePHHigh PN voltage protection (DC bus over-high voltage)PLLow PN voltage protection (DC bus over-low voltage)U74-way valve reversal abnormalU8Zero-crossing inspection circuit malfunction of IDU fan motor
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Common questions
How do I find the error code on my Frigidaire Air Conditioner?
Most Frigidaire air conditioners show the code directly on the control panel display. If your model has no display, it can be read by entering diagnostic mode with the key sequence for your model. The full procedures include model-specific instructions for reading codes.
Are these codes specific to my model?
The codes here apply broadly to Frigidaire air conditioners. Meanings and diagnostic steps can vary by model and production year, so enter your model number for model-specific information and procedures.
What do I do if my code is not listed?
Some codes are model-specific or only appear in diagnostic mode. Enter your model number to get codes specific to your unit, or contact us. We update the database continuously from manufacturer service documentation.
How much does it cost to access the full diagnostic procedures?
A 3-day pass is $9.95 one-time and gives full access to all brands, codes, and procedures. Monthly access is $29/month with unlimited access to everything including Max AI diagnostics.