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 chance your mini-split will malfunction. To identify what went wrong, you should locate where the mini-split error codes are displayed. Recognizing what these codes refer to can help ensure fast mini-split repair, especially if professional help is required.
What each code means will ultimately depend 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 trust the HVAC pros at Miller Climate Control LLC. Our technicians are trained to recognize these codes in order to deliver prompt mini-split repair in Georgetown. Give us a call at 512-937-2001 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 come across. 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 other signs of what is happening? A strange 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 indicates that communication between the mini-split system’s indoor and outdoor units has been hampered. It may 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 properly 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 Miller Climate Control LLC 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 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, 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 usually be related to your mini-splits compressor system, housed within the outdoor unit. When the compressor drive is malfunctioning, the most likely culprit is excessively high temperatures. A high temperature at the discharge line could 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 will 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 may appear. You may also find the P6 code if the compressor is struggling with high or low pressure concerns.
Review 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 have a guide for these error codes and what they can mean. But as many of these codes start with electrical problems, professional experience is usually necessary.
Call Miller Climate Control LLC for Mini-Split Repair
Miller Climate Control LLC 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 Georgetown, bringing your new system online with minimal comfort disruption.
To schedule an appointment, give us a call at 512-937-2001 today.