Lennox mini split systems are a solid way to provide compact, yet powerful temperature control for your home. Some models are built for air conditioning only, while heat pump models can provide both heating and cooling.
But no piece of HVAC equipment is flawless. There’s always a risk your mini split will malfunction. To identify what happened, 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 the error code means will ultimately depend 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 contact the HVAC pros at Heartland Heating & Cooling. Our technicians are trained to recognize these codes in order to ensure prompt mini split repair in Des Moines. Give us a call at 515-344-3579 to request an appointment.
Common Lennox Mini Split Error Codes
While error codes can differ from model to model, there are some codes you’ll be more likely to come across. To identify what your error code might mean, ask yourself the following:
- Is your model a mini split air conditioner or a mini split heat pump?
- Are there other signs of what malfunctioned? A loud noise coming from an important 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 hampered. It might 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 effectively balance indoor temperatures.
E5 – Voltage Protection or Temperature Sensor Error
If you own a mini split heat pump, an E5 error could refer to a problem with the system’s voltage. A repair technician from Heartland Heating & Cooling 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 could also represent 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, similar to 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 related to your mini splits compressor system, found 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 could 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 rise above safe levels, a safety switch will 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 may appear. You may also find the P6 code if the compressor is experiencing high or low pressure issues.
Check the Manual for Your Specific Model
Remember 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 start with electrical problems, professional experience is usually needed.
Call Heartland Heating & Cooling for Mini Split Repair
Heartland Heating & 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 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 Des Moines, bringing your new system online with minimal comfort disruption.
To schedule an appointment, give us a call at 515-344-3579 today.