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 home comfort system is flawless. There’s always a chance your mini split could malfunction. To determine what happened, you’ll want to locate where the mini split error codes are displayed. Knowing what these codes refer to 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 A&M Heating & Cooling LLC. Our technicians are trained to recognize these codes in order to provide prompt mini split repair in Tucson. Give us a call at 520-200-1048 to request 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 come across. To learn what your error code may mean, consider 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 loud noise coming from an important component, for example.
Here are some 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 problems or have failed entirely. When the indoor and outdoor units can’t communicate with one another, it will not be able to properly 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 A&M Heating & Cooling LLC 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 pointing 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 may also be a problem 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, housed within the outdoor unit. When the compressor drive is faulty, the most likely culprit is excessively high temperatures. A high temperature at the discharge line may also trigger 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 experiencing high or low pressure concerns.
Check the 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 offer a guide for these error codes and what they should mean. But since many of these codes stem from electrical problems, professional experience is usually necessary.
Call A&M Heating & Cooling LLC for Mini Split Repair
A&M Heating & Cooling LLC 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 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 Tucson, bringing your new system online with minimal comfort disruption.
To schedule an appointment, give us a call at 520-200-1048 today.