Lennox mini split systems are an excellent 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 possibility your mini split will malfunction. To identify what is malfunctioning, you should locate where the mini split error codes are displayed. Understanding 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 consult your manual to find a guide for what each code means. You can also trust the HVAC pros at Lanz Furnace and Fireplace. Our technicians are trained to recognize these codes in order to ensure prompt mini split repair in Monroe. Give us a call at 608-291-3606 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 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 other signs of what malfunctioned? A strange 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 impeded. It may 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 effectively balance indoor temperatures.
E5 – Voltage Protection or Temperature Sensor Error
If you own a mini split heat pump, an E5 error could indicate a problem with the system’s voltage. A repair technician from Lanz Furnace and Fireplace 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 could 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 may also be a problem with one of the temperature sensors.
P4 – Compressor Drive Error / High Temperature
A P4 error code will most times be concerned with your mini splits compressor system, housed within the outdoor unit. When the compressor drive is faulty, 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 ensure 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 should 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.
Check 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 provide a guide for these error codes and what they can mean. But because many of these codes stem from electrical problems, professional experience is typically needed.
Call Lanz Furnace and Fireplace for Mini Split Repair
Lanz Furnace and Fireplace can offer 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 Monroe, bringing your new system online with little to no comfort disruption.
To schedule an appointment, give us a call at 608-291-3606 today.