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 home comfort system is flawless. There’s always a risk your mini-split can malfunction. To determine what happened, 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 necessary.
What each code means will ultimately depend 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 Evenaire Heating & Air Conditioning. Our technicians are trained to recognize these codes in order to ensure prompt mini-split repair in Pflugerville. Give us a call at 512-355-1482 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 encounter. To learn what your error code could mean, consider the following:
Is your system a mini-split air conditioner or a mini-split heat pump?
Are there additional 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 impeded. It could be struggling with 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 adequately 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 Evenaire Heating & Air Conditioning may refer to it as overcurrent protection. Both excessively high or low voltage can create this error code.
For mini-split air conditioners, this code can 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 an issue with one of the temperature sensors.
P4 – Compressor Drive Error / High Temperature
A P4 error code will most times be related 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 could also lead to 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 damaged, 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 can appear. You may also find the P6 code if the compressor is experiencing high or low pressure concerns.
Consult the Manual for Your Specific 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 should mean. But because many of these codes stem from electrical problems, professional experience is typically necessary.
Call Evenaire Heating & Air Conditioning for Mini-Split Repair
Evenaire Heating & Air Conditioning 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 may 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 Pflugerville, bringing your new system online with minimal comfort disruption.
To schedule an appointment, give us a call at 512-355-1482 today.