Lennox mini split systems are an excellent way to provide compact, yet effective 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 piece of HVAC equipment is flawless. There’s always a possibility your mini split can malfunction. To determine what went wrong, you should locate where the mini split error codes are displayed. Recognizing what these codes refer to can help you kickstart mini split repair, especially if professional help is needed.
What any code means will ultimately rely on the specific model of your mini split system. You can review your manual for a guide for what each code means. You can also call the HVAC pros at GV Heating & Air. Our technicians are trained to learn these codes in order to ensure prompt mini split repair in Crystal and Twin Cities. Give us a call at 763-535-2000 to book 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 identify what your error code can mean, ask yourself 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 some of the more common error codes for Lennox mini splits.
E1 – Indoor / Outdoor Unit Communication
In general, an E1 error code means that communication between the mini split system’s indoor and outdoor units has been disrupted. 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 properly balance indoor temperatures.
E5 – Voltage Protection or Temperature Sensor Error
If you own a mini split heat pump, an E5 error could indicate a problem with the system’s voltage. A repair technician from GV Heating & Air may refer to it as overcurrent protection. Both unusually high or low voltage can produce this error code.
For mini split air conditioners, this code could also indicate 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, like an E1 code. It may 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, found within the outdoor unit. When the compressor drive is not working, the most likely cause is excessively high temperatures. A high temperature at the discharge line could 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 faulty, a P6 error code is common.
When temperatures exceed safe levels, a safety switch will protect the electrical components of your mini split system, including any components that control the outdoor compressor. If this switch is open, the P6 code can appear. You may also find the P6 code if the compressor is facing high or low pressure concerns.
Check the Manual for Your Specific Model
Remember 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 refer to electrical problems, professional experience is usually necessary.
Call GV Heating & Air for Mini Split Repair
GV Heating & Air 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 identify your unique problem.
For some problems, repairs might 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 Crystal and Twin Cities, bringing your new system online with minimal comfort disruption.
To schedule an appointment, give us a call at 763-535-2000 today.