Ice on the AC line is NOT normal — it's not a "sign of strong cooling." It's a serious symptom meaning the evaporator is freezing below 0°C, which can damage the compressor if not addressed quickly.
See if any of these signs match your device — each one increases the likelihood of this fault.
These are the causes we encounter while repairing AC freezing up / ice on lines — ranked from most to least common.
Low refrigerant = low suction pressure = freezing
Indoor filter completely clogged = insufficient airflow over evaporator = ice
Indoor fan motor weak or dust-clogged
Running at a too-low setting (16°C in cool weather)
Expansion valve failure or contamination
Any of the following = a danger signal — call now and don't try to fix it yourself.
On-site diagnosis, clear pricing before any work, and a documented 6-month warranty.