Lennox mini-split systems are an excellent 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 possibility your mini-split will malfunction. To find out what went wrong, you should locate where the mini-split error codes are displayed. Recognizing what these codes mean can help ensure fast mini-split repair, especially if professional help is required.
What the error code means will ultimately rely 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 call the HVAC pros at County Line Mechanical LLC. Our technicians are trained to learn these codes in order to ensure prompt mini-split repair in Reinholds. Give us a call at 717-216-0846 to book an appointment.
What Error Codes for Lennox Mini Splits Are Most Common?
While error codes can differ from model to model, there are some codes you’ll be more likely to come across. To determine 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 few of the more common error codes for Lennox mini-splits.
E1 – Indoor / Outdoor Unit Communication
In general, an E1 error code means that communication between the mini-split system’s indoor and outdoor units has been impeded. It could be experiencing intermittent connection issues or have failed entirely. When the indoor and outdoor units can’t communicate with one another, it will not be able to adequately balance indoor temperatures.
E5 – Voltage Protection or Temperature Sensor Error
If you own a mini-split heat pump, an E5 error can indicate a problem with the system’s voltage. A repair technician from County Line Mechanical LLC may refer to it as overcurrent protection. Both excessively high or low voltage can produce this error code.
For mini-split air conditioners, this code may also stand for 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 most times be connected to 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 faulty, a P6 error code is common.
When temperatures rise above safe levels, a safety switch will 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 can appear. You may also find the P6 code if the compressor is facing high or low pressure issues.
Check the Service 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 provide a guide for these error codes and what they should mean. But as many of these codes refer to electrical problems, professional experience is typically necessary.
Trust County Line Mechanical LLC for Mini-Split Repair
County Line Mechanical 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 specific 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 Reinholds, bringing your new system online with minimal comfort disruption.
To schedule an appointment, give us a call at 717-216-0846 today.