Lennox mini-split systems are a solid way to provide compact, yet effective 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 chance your mini-split could malfunction. To determine what is malfunctioning, you should locate where the mini-split error codes are displayed. Knowing what these codes refer to can help ensure fast mini-split repair, especially if professional help is required.
What any code means will ultimately rely on the specific model of your mini-split system. You can consult your manual for a guide for what each code means. You can also call the HVAC pros at Mayeuxs AC & Heating. Our technicians are trained to learn these codes in order to provide prompt mini-split repair in Norco and St. Charles Parish. Give us a call at (985) 764-2426 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 identify what your error code can mean, ask yourself the following:
Is your system a mini-split air conditioner or a mini-split heat pump?
Are there clear signs of what is happening? A loud noise coming from an important 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 indicates that communication between the mini-split system’s indoor and outdoor units has been hampered. It may 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 could stand for a problem with the system’s voltage. A repair technician from Mayeuxs AC & Heating may refer to it as overcurrent protection. Both excessively high or low voltage can result in this error code.
For mini-split air conditioners, this code could 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 might also be a problem 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, housed within the outdoor unit. When the compressor drive is faulty, 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 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 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 issues.
Consult the Manual for Your Specific Model
Keep in mind 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 should mean. But as many of these codes refer to electrical problems, professional experience is often necessary.
Call Mayeuxs AC & Heating for Mini-Split Repair
Mayeuxs AC & 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 Norco and St. Charles Parish, bringing your new system online with little to no comfort disruption.
To schedule an appointment, give us a call at (985) 764-2426 today.