Lennox mini split systems are a great 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 ductless mini split is flawless. There’s always a risk your mini split could malfunction. To identify what is malfunctioning, you should 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 necessary.
What each code means will ultimately depend 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 Northglenn Heating & Air Conditioning, Inc.. Our technicians are trained to recognize these codes in order to deliver prompt mini split repair in Northglenn. Give us a call at 303-452-4146 to book an appointment.
Common Lennox Mini Split Error Codes
While error codes will differ from model to model, there are some codes you’ll be more likely to encounter. To determine what your error code might 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 malfunctioned? A loud 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 hampered. It might be experiencing intermittent connection problems 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 stand for a problem with the system’s voltage. A repair technician from Northglenn Heating & Air Conditioning, Inc. may refer to it as overcurrent protection. Both excessively high or low voltage can create this error code.
For mini split air conditioners, this code can 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, like 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, found within the outdoor unit. When the compressor drive is not working, the most likely culprit is excessively high temperatures. A high temperature at the discharge line can also trigger 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 manage the outdoor compressor. If this switch is open, the P6 code can appear. You may also find the P6 code if the compressor is struggling with 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 as many of these codes start with electrical problems, professional experience is often necessary.
Call Northglenn Heating & Air Conditioning, Inc. for Mini Split Repair
Northglenn Heating & Air Conditioning, Inc. 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 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 Northglenn, bringing your new system online with little to no comfort disruption.
To schedule an appointment, give us a call at 303-452-4146 today.