Frigidaire Air Conditioner Error Code FP

The FP code on a Frigidaire air conditioner means the low temperature prevention protection has activated because the indoor ambient temperature has dropped to or below 40 degrees Fahrenheit continuously. When this happens, the unit automatically switches to pure electric heating mode to protect the refrigerant system and compressor from damage. It is a built-in safety function and does not always indicate a broken component.

The FP code itself is not a dangerous fault. It is a protective mode designed to prevent compressor and refrigerant system damage when temperatures are too low for normal heat pump operation. The unit continues to provide heat using electric resistance elements during this mode, so it does not leave the space without heating. However, if the code appears repeatedly in conditions that do not seem unusually cold, a sensor or board issue should be addressed promptly to avoid improper operation.

If the FP code is caused by genuinely cold indoor temperatures, there is no repair cost at all since it is normal protective behavior. If a faulty indoor ambient temperature sensor is responsible, sensor replacement parts typically range from around 15 to 60 dollars, with labor adding more if a technician is needed. A control board replacement, if required, generally costs between 100 and 300 dollars or more depending on the specific model.

Start by checking whether the room temperature is actually below 40 degrees Fahrenheit using a separate thermometer. If it is, allow the space to warm up and the unit should exit FP mode on its own. If the room is clearly warmer than 40 degrees Fahrenheit and the code remains, the indoor ambient temperature sensor may be faulty and should be inspected or replaced.

A manual reset by powering the unit off and back on may temporarily clear the FP display, but if the indoor temperature is still below 40 degrees Fahrenheit or a faulty sensor is present, the code will return. The underlying cause, whether environmental or component-related, needs to be addressed for the code to clear permanently. Simply resetting the unit without correcting the root cause is not a lasting solution.