Lennox mini-split systems are an excellent 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 home comfort system is flawless. There’s always a possibility your mini-split could malfunction. To find out what went wrong, you’ll want to locate where the mini-split error codes are displayed. Understanding what these codes refer to can help ensure fast mini-split repair, especially if professional help is needed.
What any code means will ultimately depend 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 Air Masters Heating & Cooling. Our technicians are trained to learn these codes in order to ensure prompt mini-split repair in Port Orchard. Give us a call at 360-205-7115 to book 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 come across. To determine what your error code may mean, ask yourself the following:
Is your system a mini-split air conditioner or a mini-split heat pump?
Are there other signs of what is happening? A strange noise coming from an important 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 signifies that communication between the mini-split system’s indoor and outdoor units has been impeded. It could be struggling with intermittent connection problems 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 can refer to a problem with the system’s voltage. A repair technician from Air Masters Heating & Cooling may refer to it as overcurrent protection. Both unusually high or low voltage can create this error code.
For mini-split air conditioners, this code may 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, 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 generally be connected to 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 can also trigger 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 issues.
Consult 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 should mean. But because many of these codes start with electrical problems, professional experience is often needed.
Contact Air Masters Heating & Cooling for Mini-Split Repair
Air Masters Heating & Cooling 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 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 Port Orchard, bringing your new system online with minimal comfort disruption.
To schedule an appointment, give us a call at 360-205-7115 today.