p6
Moderate
Mitsubishi Electric · Mini-Splits & Ductless Systems
Freeze / Overheat Protection
Quick Answer
Error code P6 on your Mitsubishi Electric Mini-Splits & Ductless Systems means: Freeze / Overheat Protection. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Clean or replace the indoor air filters immediately
2
Check the indoor coil for ice formation; if frozen, run in fan-only mode until thawed
3
Verify the indoor fan is running at the proper speed and the barrel is clean
4
Check for any obstructions blocking the indoor unit air intake or discharge
5
If the code persists after filter cleaning, a licensed HVAC technician should check the refrigerant charge
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Air filters
Indoor fan motor (if failing)
Refrigerant (R-410A)
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