Lennox mini-split systems are a great way to provide compact, yet powerful temperature control for your home. Some models are built for air conditioning only, while heat pump models can offer both heating and cooling.
But no ductless mini-split is flawless. There’s always a risk your mini-split could malfunction. To determine what is malfunctioning, you’ll want to locate where the mini-split error codes are displayed. Knowing what these codes mean can help you kick-start mini-split repair, especially if professional help is needed.
What each code means will ultimately rely on the specific model of your mini-split system. You can check your manual for a guide for what each code means. You can also contact the HVAC pros at Knoechel Heating. Our technicians are trained to learn these codes in order to ensure prompt mini-split repair in Zelienople. Give us a call at 724-425-5852 to request an appointment.
Common Lennox Mini-Split Error Codes
While error codes can differ from model to model, there are some codes you’ll be more likely to encounter. To learn what your error code could mean, consider the following:
Is your system a mini-split air conditioner or a mini-split heat pump?
Are there additional signs of what is happening? A loud noise coming from a key component, for example.
Here are a few of the more common error codes for Lennox mini-splits.
E1 – Indoor / Outdoor Unit Communication
In general, an E1 error code indicates that communication between the mini-split system’s indoor and outdoor units has been impeded. It might be struggling with intermittent connection problems or have failed entirely. When the indoor and outdoor units can’t communicate with one another, it will not be able to properly balance indoor temperatures.
E5 – Voltage Protection or Temperature Sensor Error
If you own a mini-split heat pump, an E5 error can stand for a problem with the system’s voltage. A repair technician from Knoechel Heating may refer to it as overcurrent protection. Both very high or low voltage can create this error code.
For mini-split air conditioners, this code could also stand for voltage issues. In other cases, it’s pointing you to a circuit problem with the outdoor temperature sensor.
E6 – Indoor / Outdoor Unit Communication
An E6 error code can also refer to a communication problem between the two units, like an E1 code. It could also be an issue with one of the temperature sensors.
P4 – Compressor Drive Error / High Temperature
A P4 error code will most times be related to your mini-splits compressor system, found within the outdoor unit. When the compressor drive is malfunctioning, the most likely reason is excessively high temperatures. A high temperature at the discharge line could also trigger a P4 code.
P6 – Compressor Switch Open or Drive Board Failure
Your mini-split system will have computer boards that ensure the indoor and outdoor units can communicate with one another. If the drive board is malfunctioning, a P6 error code is common.
When temperatures rise above safe levels, a safety switch will protect the electrical components of your mini-split system, including any components that manage the outdoor compressor. If this switch is open, the P6 code may appear. You may also find the P6 code if the compressor is facing high or low pressure concerns.
Consult the Manual for Your Specific Model
Keep in mind that in general, error codes are specific to each model of a Lennox mini-split system. Your manual will provide a guide for these error codes and what they can mean. But because many of these codes start with electrical problems, professional experience is often necessary.
Call Knoechel Heating for Mini-Split Repair
Knoechel Heating can deliver fast and affordable ductless mini-split repair. Whether you own a mini-split AC system or a mini-split heat pump, our technicians can quickly diagnose your specific problem.
For some problems, repairs may not be worth it. But that doesn’t mean the mini-split replacement process has to be stressful. We can provide equally effective mini-split installation in Zelienople, bringing your new system online with minimal comfort disruption.
To schedule an appointment, give us a call at 724-425-5852 today.