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 provide both heating and cooling.
But no ductless mini-split is flawless. There’s always a possibility 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 refer to can help you kick-start mini-split repair, especially if professional help is necessary.
What any code means will ultimately rely on the specific model of your mini-split system. You can check your manual to find a guide for what each code means. You can also contact the HVAC pros at Appalachian Heating. Our technicians are trained to recognize these codes in order to provide prompt mini-split repair in Mount Hope. Give us a call at 304-707-0600 to schedule an appointment.
What Error Codes for Lennox Mini Splits Are Most Common?
While error codes may differ from model to model, there are some codes you’ll be more likely to encounter. To determine what your error code can mean, consider the following:
Is your model 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 indicates that communication between the mini-split system’s indoor and outdoor units has been disrupted. It might be experiencing 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 effectively balance indoor temperatures.
E5 – Voltage Protection or Temperature Sensor Error
If you own a mini-split heat pump, an E5 error may stand for a problem with the system’s voltage. A repair technician from Appalachian Heating may refer to it as overcurrent protection. Both very high or low voltage can result in 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 may also be a problem with one of the temperature sensors.
P4 – Compressor Drive Error / High Temperature
A P4 error code will usually be connected to your mini-splits compressor system, housed 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 can 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 exceed 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 can appear. You may also find the P6 code if the compressor is struggling with high or low pressure concerns.
Consult the Manual for the Exact Model
Don’t forget 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 because many of these codes stem from electrical problems, professional experience is often necessary.
Trust Appalachian Heating for Mini-Split Repair
Appalachian Heating can provide 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 Mount Hope, bringing your new system online with minimal comfort disruption.
To schedule an appointment, give us a call at 304-707-0600 today.