If you have a mini split that gives an E1 error code, there are a few things to check before calling an HVAC company.
Several things can cause an E1 error code on a mini split, and of course, the error can be manufacture specific.
The most common fix is to turn the unit off at the breaker for 2-5 minutes, resetting both indoor and outdoor condensers.
There can be a difference in errors depending on a manufacturer and model, so always verify your mini split error code with the manual for the unit.
Steps To Fix a Mini Split E1 Error Code
- Power off the Unit
- Turn the power off at the breaker for 4-5 minutes, resetting the unit.
- Turn the power on and see if the error goes away.
Resetting the whole system is the first step and often solves the problem.
If the error comes back, below are things that can be checked.
Causes of E1 Error Code on a Mini Split
- Dirty Air Filter
- Loose Wiring Connections
- Communication Problem Between the Indoor and Outdoor Units
- Bad PCB Board
Many units will give an E1 code to remind a homeowner to clean the filter.
The filter is located in the inside unit, usually under the door or on the very top.
They can be removed and cleaned with water.
After cleaning the filter, install it back into the unit and reset it again to see if the error code clears.
Often a loose connection won’t be visible and need each plug pushed on to check.
Be sure the power is off before opening the panels.