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 piece of HVAC equipment is flawless. There’s always a possibility your mini-split can malfunction. To identify what happened, you should locate where the mini-split error codes are displayed. Recognizing what these codes mean can help you kick-start mini-split repair, especially if professional help is necessary.
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 contact the HVAC pros at Northern Comfort Inc. Our technicians are trained to recognize these codes in order to provide prompt mini-split repair in Mankato area. Give us a call at 507-387-6596 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 encounter. To identify what your error code might mean, ask yourself the following:
Is your system a mini-split air conditioner or a mini-split heat pump?
Are there additional signs of what malfunctioned? 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 means that communication between the mini-split system’s indoor and outdoor units has been impeded. It could be experiencing 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 Northern Comfort Inc 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 may 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, located within the outdoor unit. When the compressor drive is not working, the most likely culprit is excessively high temperatures. A high temperature at the discharge line may also result in 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 damaged, 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 struggling with high or low pressure issues.
Review Your Service Manual for the Exact Model
Remember that in general, error codes are specific to each model of a Lennox mini-split system. Your manual will offer a guide for these error codes and what they should mean. But because many of these codes start with electrical problems, professional experience is usually required.
Trust Northern Comfort Inc for Mini-Split Repair
Northern Comfort Inc 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 Mankato area, bringing your new system online with little to no comfort disruption.
To schedule an appointment, give us a call at 507-387-6596 today.
