Amana Error Code Search
Error code search offers information on the cause of the malfunction and the status of your air conditioner by entering the error code.
- This page provides a simple explanation concerning content relating to error codes and their possible causes. Please note that the content may slightly differ depending on the model.
2. It is always advised that you consult with an HVAC repair professional before attempting to provide any repairs yourself.
3. Precision Air assumes no responsibility for any accidents or troubles caused in the disassembly or repair of equipment performed according to the information on this page.
If molded case circuit breakers or earth leakage circuit breakers have tripped, do not reset the breaker immediately without first checking for any problems with the insulation of equipment.
Resetting breakers without a check of insulation may cause damage to equipment.
Amana Air Conditioning Codes:
FP – FREEZE PROTECTION
The code “FP” indicates the system is in Freeze Protection mode. Freeze protection mode is activated when the thermostat or thermistor detects temperatures below 40 ℉. This keeps the essential elements from freezing and causing damage. The unit will move out of Freeze protection mode once the thermostat or thermistor read above 43 ℉.
FD – FRONT DESK SWITCH
The code “Fd” means that the front desk switch is closed. In other words, all outputs for the unit are off. To fix this, you would need to ask the front desk to re-open the switch so that the unit can resume regular operation.
EO – SERVICE BOARD NOT CONFIGURED
The code “Eo” indicates that the service board on the unit is not configured properly. To fix this, you will need to change the configuration settings in the menu of the unit. If the setting reads “C3,” change this to “C.” Note that this applies to PTAC units that also have electric heat. For units that operate using heat pumps instead, change the setting to “H” instead.
EH – EMERGENCY HYDRONIC MODE
The code “EH” means that the system is in Emergency Hydronic mode. This also typically means that the compressor is off and the EHH switch is closed. To move out of this mode, you will need to re-open the emergency hydronic switch.
LS – LOAD SHEDDING MODE
The code “LS” means that the unit is in Load Shedding mode. This means that the compressor and the electric heat are both off. The LS switch is aso closed. To move the unit out of this mode, simply re-open the LS switch on the unit.
ON – WIRED THERMOSTAT CONFIGURATION
The code “On” appears in the display when the unit has been configured to work with a wired thermostat (instead of a wireless one). If you are attempting to use the unit with a wireless thermostat, this will cause a configuration error. To fix this, you will need to change the configuration mode to the proper setting in the configuration menu.
OP / NP – OPEN DOOR OR WINDOW LOCKOUT MODE
The codes “oP” or “nP” may appear if the unit detects that a door or window is open in the room. This may cause the unit to stop working completely for energy conservation. To resume regular operation, simply close the door or window.
HP – HEAT SENTINEL MODE
The code “HP” indicates that the unit has entered Heat Sentinel mode. Much like freeze protection mode, heat sentinel mode protects the unit from overheating. It may also trigger a cooling function as a proactive measure. The unit should move out of this mode automatically once the temperature of the room or the unit itself returns to safer levels.
UR – UN-RENTED MODE
The code “Ur” indicates that the unit has a status of “Un-Rented.” This may keep the unit from functioning properly. To move the unit out of this mode, you will need to contact the front desk to change the status from “Un-Rented” to “Rented.” Note that this does not apply to all units.
F1 – THERMISTOR AND THERMOSTAT FAILURE
The code “F1” typically indicates a double failure. First, the Indoor Ambient Thermistor (black) is reading outside of the predetermined range (-20 ℉ to 200 ℉). Second, it means that the wireless thermostat is no longer sending signals to the unit control. To fix this error, you would need to replace the black thermistor and/or the wireless thermostat.
F2 – WIRELESS REMOTE THERMOSTAT FAILURE
The code “F2” indicates that the Wireless Remote Thermostat has failed. As a solution, you will need to replace it.
F3 – INDOOR AMBIENT THERMISTOR (BLACK) FAILURE
Like “F1,” the code “F3” indicates that the black Indoor Ambient Thermistor on the unit is reading outside of its predetermined range (-20 ℉ to 200 ℉). As a solution, it will need to be replaced.
F4 – INDOOR COIL THERMISTOR (RED) FAILURE
The code “F4” means that the red Indoor Coil Thermistor is no longer working or has exceeded its operating tolerance. In this case, you will need to replace it.
F5 – WIRELESS THERMOSTAT FAILURE
The code “F5” means that the wireless thermostat itself has failed. To fix this, you would either need to rebind the thermostat or replace it entirely.
F6 – INDOOR DISCHARGE THERMISTOR (YELLOW) FAILURE
The code “F6” indicates a failure in the yellow Indoor Discharge Thermistor. This means that it is either above or below its operating tolerance. In this case, it will need to be replaced.
FB – LOW REMOTE BATTERY
The code “Fb” indicates that the battery in the PTAC remote is too low. In this case, you will need to replace the battery inside the device.
H1 – HIGH VOLTAGE PROTECTION
The code “H1” typically indicates that the input voltage is too high. As a solution, check the voltage coming into the unit and adjust accordingly. Note that higher voltages are capable of delivering extreme shock, and you should exercise great caution when checking voltage for your unit. You may also need to contact an electrician.
BR – BROWN OUT PROTECTION
The code “Br” usually means that the unit has lost power or the incoming voltage is too low. Brown out protection keeps the unit from being damaged by any fluctuations in electrical energy. In this case, you will need to check the voltage coming to the unit and adjust to the proper levels. In this case, still exercise caution and call an electrician for safety.
L6 – DISCHARGE AIR HEAT WARNING
The code “L6” indicates that the air flowing out of the unit (known as discharge or “head”) is too hot for normal operation. Typically this can be fixed by cleaning the air filter.
LC- OUTDOOR COIL THERMISTOR (RED) HEAT WARNING
The code “LC” will display when the red Outdoor Coil Thermistor is reaching temperatures that are too hot for normal operation. To fix this, you may try cleaning the condenser coils and the air filter. You will also want to make sure the condenser fan is working properly.
C2 – INDOOR AIR RECIRCULATION
The code “C2” means that the air inside the room is being recirculated through the unit. This creates a problem with both conditioning and freshness. To fix this, check the seal around your unit and be sure it creates a solid barrier between inside and outside air. This ensures that airflow is conditioned entirely through the unit. You may also need to close the vent door and clean the filter.
C5 – OUTDOOR COIL HEAT WARNING
The code “C5” indicates that the temperature of the outdoor coils is too high for outdoor ambient readings. As a solution, you will likely need to clean the coils and remove anything that might block outdoor air from flowing into the unit.
C1, C3, AND C4 – INDOOR COIL FREEZE WARNING
If your machine shows codes “C1,” “C3,” or “C4,” this indicates that the indoor coil is either starting to freeze or already frozen. To fix this, you will want to start by cleaning the filter and checking for defects in the fans or blowers. Then, check for low refrigerant levels and fix any possible leaks. After this, make sure the capillary tube is not restricted in any way.
C6 – POOR UNIT PERFORMANCE
The code “C6” can mean that multiple parts of the unit are malfunctioning or at least not running as effectively as they should. Check the operation of the blower motor, the compressor, and all electric heat components. Replace or clean any parts as necessary.
C7 – INDOOR FREEZING LOCKOUT
The code “C7” indicates the same freezing issue from codes “C1,” “C3,” and “C4.” However this code will also lock the temperature settings and any other normal operation of the controls for up to ten minutes. To fix this, follow the same troubleshooting steps for the Indoor Coil Freeze Warning.