2 months ago and they did a chemical wash. It is only happen 2 days ago. The strange thing is the unit that never turn on get the ice build up once I turn on the other one for less than 10 min. Both units shared the same compressor.
thanks
I've a problem with one of indoor unit, its fan coil start to built up ice(even it is not on) when the other one turn on (this one is not so cold).
Any idea?