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 offer both heating and cooling.
But no home comfort system is flawless. There’s always a chance your mini split could malfunction. To identify what happened, you should locate where the mini split error codes are displayed. Understanding what these codes refer to can help you kickstart mini split repair, especially if professional help is necessary.
What the error code means will ultimately rely on the specific model of your mini split system. You can check your manual to find a guide for what each code means. You can also contact the HVAC pros at H&C Heating and Cooling. Our technicians are trained to recognize these codes in order to ensure prompt mini split repair in Laurel. Give us a call at 301-960-3247 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 come across. To learn what your error code might mean, consider the following:
- Is your system a mini split air conditioner or a mini split heat pump?
- Are there additional 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 means that communication between the mini split system’s indoor and outdoor units has been disrupted. It might be facing 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 can stand for a problem with the system’s voltage. A repair technician from H&C Heating and Cooling may refer to it as overcurrent protection. Both very high or low voltage can result in 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 could also be a problem with one of the temperature sensors.
P4 – Compressor Drive Error / High Temperature
A P4 error code will generally be concerned with your mini splits compressor system, housed 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 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 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 may appear. You may also find the P6 code if the compressor is facing high or low pressure issues.
Consult 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 offer a guide for these error codes and what they should mean. But since many of these codes refer to electrical problems, professional experience is usually needed.
Call H&C Heating and Cooling for Mini Split Repair
H&C Heating and Cooling 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 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 Laurel, bringing your new system online with little to no comfort disruption.
To schedule an appointment, give us a call at 301-960-3247 today.