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 deliver both heating and cooling.
But no home comfort system is flawless. There’s always a possibility your mini split could malfunction. To identify what happened, you’ll want to locate where the mini split error codes are displayed. Knowing what these codes mean can help you kickstart 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 check your manual to find a guide for what each code means. You can also trust the HVAC pros at Bishop Heating & Air Conditioning. Our technicians are trained to recognize these codes in order to ensure prompt mini split repair in Bishop. Give us a call at 760-784-9034 to request an appointment.
Common Lennox Mini Split Error Codes
While error codes can 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 model a mini split air conditioner or a mini split heat pump?
- Are there additional signs of what malfunctioned? A strange noise coming from a key component, for example.
Here are a few 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 could 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 adequately balance indoor temperatures.
E5 – Voltage Protection or Temperature Sensor Error
If you own a mini split heat pump, an E5 error could refer to a problem with the system’s voltage. A repair technician from Bishop Heating & Air Conditioning may refer to it as overcurrent protection. Both unusually 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 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 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, located within the outdoor unit. When the compressor drive is malfunctioning, the most likely reason is excessively high temperatures. A high temperature at the discharge line may also lead to 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 damaged, a P6 error code is common.
When temperatures rise above 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 could 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 offer a guide for these error codes and what they can mean. But because many of these codes stem from electrical problems, professional experience is usually necessary.
Call Bishop Heating & Air Conditioning for Mini Split Repair
Bishop Heating & Air Conditioning 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 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 Bishop, bringing your new system online with minimal comfort disruption.
To schedule an appointment, give us a call at 760-784-9034 today.