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 piece of HVAC equipment is flawless. There’s always a chance your mini-split could malfunction. To find out what happened, you should 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 needed.
What each 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 call the HVAC pros at Forster Heating. Our technicians are trained to recognize these codes in order to ensure prompt mini-split repair in Auburn. Give us a call at 530-885-8081 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 might mean, consider the following:
Is your model a mini-split air conditioner or a mini-split heat pump?
Are there other signs of what is happening? A strange noise coming from a key 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 disrupted. 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 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 could indicate a problem with the system’s voltage. A repair technician from Forster Heating 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 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, similar to an E1 code. It could also be an issue with one of the temperature sensors.
P4 – Compressor Drive Error / High Temperature
A P4 error code will generally be related to your mini-splits compressor system, found within the outdoor unit. When the compressor drive is not working, the most likely reason 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 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 exceed 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 could appear. You may also find the P6 code if the compressor is experiencing high or low pressure concerns.
Consult Your Service Manual for the Exact 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 refer to electrical problems, professional experience is typically required.
Trust Forster Heating for Mini-Split Repair
Forster Heating 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 unique 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 Auburn, bringing your new system online with little to no comfort disruption.
To schedule an appointment, give us a call at 530-885-8081 today.