Amana Air Conditioners Error Codes

CF

Amana window or PTAC AC displays CF periodically; unit may beep but continues to run.

Filter Cleaning Reminder

E1

Room air Amana window or PTAC air conditioner will not run; display shows E1 and unit may beep once when buttons are pressed.

Room Thermistor (Indoor Temperature Sensor) Failure

E2

Amana air conditioner runs briefly then shuts down; display shows E2 and cooling stops.

Evaporator Coil Thermistor Failure or Freeze Protection Fault

E3

Amana PTAC or window AC displays E3 and may not cool properly; unit may shut down intermittently.

Outdoor (Condenser) Thermistor Failure

E4

Unit displays E4 and compressor does not start or shuts off quickly; may occur during very hot operation.

High-Pressure Protection / Overheat Fault

E5

Display shows E5 and unit may not cool or may shut down; sometimes appears after long operation.

Low-Temperature / Anti-Freeze Protection Fault

E6

Amana air conditioner displays E6 and will not respond to remote or keypad commands properly.

Communication Error Between Display Board and Main Control Board

E7

Unit shows E7 and may not accept commands from the wall thermostat or remote; PTAC may not switch modes correctly.

Thermostat or Control Input Error

E8

Display shows E8 and unit may shut down or limit operation; often associated with very high or low room temperatures.

Over-Temperature or Under-Temperature Protection

E9

Amana air conditioner displays E9 and may not start the compressor or fan; sometimes occurs after a power surge.

EEPROM / Memory Error on Control Board

F1

Amana central air handler or packaged AC shows F1 on the display; blower may not run correctly.

Indoor Blower Motor Fault

F2

Amana central AC or heat pump control shows F2; system may not cool or may shut down intermittently.

High-Pressure Switch Open

F3

System displays F3; compressor may not start or may short-cycle; sometimes accompanied by outdoor unit humming.

Low-Pressure Switch Open / Loss of Charge Protection

F4

Amana central AC control shows F4; outdoor unit may not run even though thermostat calls for cooling.

Outdoor Temperature Sensor Fault

F5

System displays F5; compressor may be locked out or system may run in a limited mode.

Discharge Line Temperature Sensor Fault

F6

Amana communicating thermostat or control shows F6; system may not respond to thermostat commands.

Communication Fault Between Indoor and Outdoor Units

H1

Amana heat pump in heating mode shows H1; outdoor unit may defrost frequently or stop heating.

Defrost Sensor or Defrost Control Fault

H2

Heat pump displays H2; unit may shut down heating during very cold weather.

Low Outdoor Temperature Lockout or Sensor Error

HI

Display shows HI and unit may shut down or limit operation; often during very high line voltage conditions.

High Line Voltage Protection

LO

Display shows LO and unit does not cool; may indicate low voltage or brownout condition.

Low Line Voltage Protection

PF

Display shows PF and unit may be off after a power outage or interruption.

Power Failure Indication

Symptom

A burning or electrical smell is noticeable when the Amana air conditioner operates.

Overheating Electrical Component

Symptom

A musty or moldy odor comes from the Amana air conditioner when it starts or runs.

Biological Growth on Evaporator Coil and Drain Pan

Symptom

Amana air conditioner blows warm air in cooling mode; compressor and fan appear to run.

Refrigeration Circuit Failure

Symptom

Amana air conditioner display and controls are unresponsive; buttons do not change settings.

User Interface / Keypad Failure

Symptom

Amana air conditioner fan runs but airflow is weak from the front grille or vents.

Restricted Airflow / Blower Performance Issue

Symptom

Amana air conditioner frequently turns on and off in short cycles (short cycling) without reaching the set temperature.

Short Cycling / Control or Capacity Issue

Symptom

Amana air conditioner leaks water inside the room; water drips from the front panel or onto the floor.

Condensate Drainage Failure

Symptom

Amana air conditioner leaks water outside excessively, causing staining or puddles below the unit.

Excessive Condensate Discharge

Symptom

Amana air conditioner makes loud rattling, buzzing, or grinding noises during operation.

Mechanical Noise / Vibration Fault

Symptom

Amana air conditioner powers on but compressor does not start; fan may run continuously with no cooling.

Compressor Start Failure

Symptom

Amana air conditioner remote control does not operate the unit; unit works from front panel only.

Remote Control / IR Receiver Issue

Symptom

Amana air conditioner runs but does not cool the room effectively; air from vents is only slightly cool or room temperature.

Insufficient Cooling Capacity / Poor Heat Transfer

Symptom

Amana air conditioner runs continuously and does not shut off even when the room feels cold.

Thermostat / Temperature Control Failure

Symptom

Amana air conditioner trips the circuit breaker when it starts or shortly after running.

Overcurrent / Electrical Short

Symptom

Amana air conditioner vibrates excessively, causing the wall or window frame to shake.

Excessive Vibration / Imbalance

Symptom

Amana air conditioner will not turn on at all; no lights or display, fan and compressor do not run.

No Power / Dead Unit

Symptom

Amana heat pump in heating mode runs but delivers little or no warm air; auxiliary heat may not engage.

Heat Pump Heating Performance Issue

Symptom

Frost or ice forms on the indoor coil or front grille of the Amana air conditioner during cooling.

Evaporator Coil Icing

Symptom

Outdoor section of Amana central AC or heat pump is very noisy, with a loud humming or grinding sound.

Outdoor Fan or Compressor Mechanical Failure