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 chance your mini split will malfunction. To find out what went wrong, you should 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 each code means will ultimately rely 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 trust the HVAC pros at Jack's Heating, Cooling, Stoves & Fireplaces. Our technicians are trained to learn these codes in order to provide prompt mini split repair in Alliance. Give us a call at 308-321-4703 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, consider the following:
- Is your model a mini split air conditioner or a mini split heat pump?
- Are there clear signs of what is happening? A loud noise coming from a key 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 hampered. It might be struggling with 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 may refer to a problem with the system’s voltage. A repair technician from Jack's Heating, Cooling, Stoves & Fireplaces may refer to it as overcurrent protection. Both very 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 a problem 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, located within the outdoor unit. When the compressor drive is malfunctioning, the most likely cause is excessively high temperatures. A high temperature at the discharge line can 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 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.
Consult the Manual for Your Specific Model
Don’t forget 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 should mean. But because many of these codes stem from electrical problems, professional experience is often required.
Call Jack's Heating, Cooling, Stoves & Fireplaces for Mini Split Repair
Jack's Heating, Cooling, Stoves & Fireplaces 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 specific 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 Alliance, bringing your new system online with minimal comfort disruption.
To schedule an appointment, give us a call at 308-321-4703 today.