Mitsubishi · Mini-split
P6 Coil freezing or overheating
What this code means
The evaporator coil is freezing (in cooling mode) or overheating (in heating mode), usually from restricted airflow.
Most likely causes
- Dirty air filter
- Blocked outdoor unit airflow
- Low refrigerant charge
What to try first
Clean or rinse the washable filters inside the indoor head — this is the most common fix.
Good news: this one is often fixable without a service call. If it persists after the steps above, have it looked at.
Find the part on Amazon →FAQ
What does Mitsubishi error code P6 mean?
Coil freezing or overheating. The evaporator coil is freezing (in cooling mode) or overheating (in heating mode), usually from restricted airflow.
Can I fix Mitsubishi code P6 myself?
Often, yes. Clean or rinse the washable filters inside the indoor head — this is the most common fix.
What causes Mitsubishi code P6?
The most common causes are: dirty air filter; blocked outdoor unit airflow; low refrigerant charge.
Other Mitsubishi mini-split codes
All Mitsubishi mini-split error codes →
Other mini-split brands: Daikin · LG · Fujitsu · Gree · Carrier · Generic · Panasonic
This information may contain errors or not apply to your exact model — always double-check it against your appliance's own manual before acting. If there's any chance of a gas, fire, electrical, carbon monoxide, or other safety hazard, stop and call a licensed professional or the appropriate agency (e.g. your gas utility) instead of relying on this page alone.