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 ductless mini-split is flawless. There’s always a possibility your mini-split will malfunction. To identify what is malfunctioning, 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 rely on the specific model of your mini-split system. You can review your manual to find a guide for what each code means. You can also call the HVAC pros at Strine's. Our technicians are trained to recognize these codes in order to deliver prompt mini-split repair in York. Give us a call at 717-383-4479 to request 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 come across. 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 is happening? A strange noise coming from a specific component, for example.
Here are a handful 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 may be experiencing intermittent connection problems 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 may refer to a problem with the system’s voltage. A repair technician from Strine's may refer to it as overcurrent protection. Both excessively 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 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 might 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, found within the outdoor unit. When the compressor drive is malfunctioning, 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 ensure 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 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 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 offer 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 needed.
Call Strine's for Mini-Split Repair
Strine's 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 York, bringing your new system online with little to no comfort disruption.
To schedule an appointment, give us a call at 717-383-4479 today.