Mini Split Won’t Turn On – What To Check First

Modified on Wed, 2 Apr at 1:12 PM

Your Senville mini split air conditioner is not turning on, either from the remote or at the unit. This guide will walk you through the most common causes and steps to get it working again.

Step 1: Check the Power Source

Breaker Panel: Ensure the breaker labeled for your mini split is not tripped. If it is, reset it by switching it fully OFF and then ON again.
Disconnect Box (Outdoor Unit): Some systems have a disconnect switch near the outdoor unit. Make sure it’s in the ON position.

? Tip: If your breaker continues to trip, stop here and contact an electrician or HVAC technician. This could indicate an electrical fault.

Step 2: Inspect the Remote Control

Check the Batteries: Replace with fresh batteries and ensure they are inserted correctly.
Signal Line of Sight: Make sure there are no obstructions between the remote and the indoor unit.
Try Manual Power On: On some indoor units, there’s a small emergency power button under the front panel. Press it to test whether the unit powers on.

Step 3: Look for Error Codes

LED Indicators: The indoor unit may flash a sequence of lights. This is a diagnostic code.
Remote Display: Some remotes will display an error code (e.g., E1, E5).
What to Do: Note the code and contact Senville support or refer to your unit’s manual for a list of error codes.

Step 4: Check the Outdoor Unit

Listen for Noise: If the fan or compressor is trying to start but fails, there may be a mechanical or electrical issue.
Ice Build-up or Debris: Visually inspect the outdoor unit for signs of icing, blockage, or debris.

⚠️ Warning: Never open or disassemble your unit unless you’re trained to do so. Always call a licensed HVAC technician for internal repairs.

Step 5: Temperature Settings

Mode Check: Make sure your unit is in the correct mode (e.g., Cooling vs. Heating).
Temperature Setpoint: Set the temperature at least 2–3°F (1–2°C) below the room temperature to activate cooling (or above for heating).

Still Not Working?

If you’ve checked all the above and your unit still won’t turn on, please submit a support ticket or contact our technical support team directly. We’ll be happy to assist further.