Lennox mini split systems are a solid way to provide compact, yet powerful temperature control for your home. Some models are built for air conditioning only, while heat pump models can deliver both heating and cooling.
But no ductless mini split is flawless. There’s always a possibility your mini split will malfunction. To identify what happened, you’ll want to locate where the mini split error codes are displayed. Knowing what these codes refer to can help you kickstart mini split repair, especially if professional help is required.
What the error code means will ultimately rely on the specific model of your mini split system. You can consult your manual to find a guide for what each code means. You can also trust the HVAC pros at Booneville Heating & Cooling LLC. Our technicians are trained to recognize these codes in order to deliver prompt mini split repair in Booneville. Give us a call at 662-269-8716 to request an appointment.
Common Lennox Mini Split Error Codes
While error codes will differ from model to model, there are some codes you’ll be more likely to see. To learn what your error code may mean, consider the following:
- Is your system a mini split air conditioner or a mini split heat pump?
- Are there clear signs of what malfunctioned? A strange noise coming from a specific component, for example.
Here are a handful 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 may be facing intermittent connection issues or have failed entirely. When the indoor and outdoor units can’t communicate with one another, it will be unable to effectively balance indoor temperatures.
E5 – Voltage Protection or Temperature Sensor Error
If you own a mini split heat pump, an E5 error could stand for a problem with the system’s voltage. A repair technician from Booneville Heating & Cooling LLC may refer to it as overcurrent protection. Both excessively high or low voltage can result in this error code.
For mini split air conditioners, this code can also represent voltage issues. In other cases, it’s alerting 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, similar to 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 usually be concerned with your mini splits compressor system, housed within the outdoor unit. When the compressor drive is faulty, the most likely reason is excessively high temperatures. A high temperature at the discharge line can also lead to a P4 code.
P6 – Compressor Switch Open or Drive Board Failure
Your mini split system will have computer boards that make sure 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 could 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 have a guide for these error codes and what they can mean. But as many of these codes stem from electrical problems, professional experience is typically necessary.
Call Booneville Heating & Cooling LLC for Mini Split Repair
Booneville Heating & Cooling LLC can offer 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 Booneville, bringing your new system online with minimal comfort disruption.
To schedule an appointment, give us a call at 662-269-8716 today.