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 offer both heating and cooling.
But no piece of HVAC equipment is flawless. There’s always a risk your mini split will malfunction. To identify what happened, you should locate where the mini split error codes are displayed. Knowing what these codes refer to can help you kickstart mini split repair, especially if professional help is necessary.
What the error code means will ultimately depend 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 trust the HVAC pros at Four Seasons Air Conditioning and Heating LLC. Our technicians are trained to recognize these codes in order to ensure prompt mini split repair in Kingsville. Give us a call at 361-214-1203 to schedule 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 encounter. To learn what your error code could 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 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 signifies that communication between the mini split system’s indoor and outdoor units has been disrupted. 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 can refer to a problem with the system’s voltage. A repair technician from Four Seasons Air Conditioning and Heating 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 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 usually be concerned with your mini splits compressor system, located within the outdoor unit. When the compressor drive is not working, the most likely reason 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 rise above 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 may appear. You may also find the P6 code if the compressor is facing high or low pressure issues.
Review 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 offer a guide for these error codes and what they should mean. But because many of these codes stem from electrical problems, professional experience is often required.
Call Four Seasons Air Conditioning and Heating LLC for Mini Split Repair
Four Seasons Air Conditioning and Heating LLC 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 diagnose 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 Kingsville, bringing your new system online with minimal comfort disruption.
To schedule an appointment, give us a call at 361-214-1203 today.