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 offer both heating and cooling.
But no piece of HVAC equipment is flawless. There’s always a possibility your mini-split will malfunction. To determine what is malfunctioning, you’ll want to locate where the mini-split error codes are displayed. Knowing what these codes mean can help ensure fast mini-split repair, especially if professional help is required.
What each code means will ultimately rely on the specific model of your mini-split system. You can check your manual for a guide for what each code means. You can also call the HVAC pros at Street Heating and Cooling. Our technicians are trained to recognize these codes in order to provide prompt mini-split repair in Rapid City. Give us a call at 605-206-3915 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 see. To determine what your error code can mean, ask yourself 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 strange noise coming from a specific 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 signifies that communication between the mini-split system’s indoor and outdoor units has been disrupted. It might 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 may stand for a problem with the system’s voltage. A repair technician from Street Heating and Cooling 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 can 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 might 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 faulty, the most likely cause is excessively high temperatures. A high temperature at the discharge line may also result in 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 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 facing high or low pressure concerns.
Check the Manual for Your Specific Model
Keep in mind 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 should mean. But because many of these codes start with electrical problems, professional experience is typically necessary.
Call Street Heating and Cooling for Mini-Split Repair
Street Heating and Cooling 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 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 Rapid City, bringing your new system online with minimal comfort disruption.
To schedule an appointment, give us a call at 605-206-3915 today.