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 home comfort system is flawless. There’s always a chance your mini-split could malfunction. To determine what went wrong, you’ll want to locate where the mini-split error codes are displayed. Understanding what these codes mean can help you kick-start mini-split repair, especially if professional help is necessary.
What each 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 Bell Mechanical Services. Our technicians are trained to learn these codes in order to ensure prompt mini-split repair in McKinney and Frisco. Give us a call at 888-863-0560 to request an appointment.
Common Lennox Mini-Split Error Codes
While error codes may differ from model to model, there are some codes you’ll be more likely to see. To determine what your error code might mean, ask yourself the following:
Is your model a mini-split air conditioner or a mini-split heat pump?
Are there clear signs of what is happening? A loud noise coming from a key 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 disrupted. It might be facing intermittent connection issues 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 can refer to a problem with the system’s voltage. A repair technician from Bell Mechanical Services may refer to it as overcurrent protection. Both very high or low voltage can create this error code.
For mini-split air conditioners, this code may also represent 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, similar to 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 related to your mini-splits compressor system, located within the outdoor unit. When the compressor drive is faulty, the most likely cause is excessively high temperatures. A high temperature at the discharge line can 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 malfunctioning, a P6 error code is common.
When temperatures rise above safe levels, a safety switch should 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 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
Remember that in general, error codes are different for each model of a Lennox mini-split system. Your manual will provide a guide for these error codes and what they can mean. But as many of these codes start with electrical problems, professional experience is typically necessary.
Call Bell Mechanical Services for Mini-Split Repair
Bell Mechanical Services 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 specific 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 McKinney and Frisco, bringing your new system online with little to no comfort disruption.
To schedule an appointment, give us a call at 888-863-0560 today.