Used to be service aircond every 6-8 months bcoz my house is next to main road. After install those pre filter i never service aircond anymore for 3 years. and the coil is still very clean and cold until now. Not sure it will spoil my aircon or not. But really save lot of money for whole house aircond.

This post has been edited by vl319: Jun 15 2025, 12:59 AM

I guess 3 years too long 🙂

Sometimes once a year, sometimes 2 years.
Usually service only to clean indoor and outdoor unit, never done major service that need to take down the aircond unit.

Noted 🙂

What pre filter?

What filter? Regardless if the indoor unit looks clean, you still need to clean the outdoor unit for optimal performance.

Daiso pre filter netting.replacing every month..to me outdoor is easier to diy as i dont need to worry about the water splashing around

Hi sifus,

Can ask why my aircond running cold air, but the room just cannot cool down? Already close all doors and windows but still difficult to cool down the room. Anything I should check? Gas is ok and already technician check the whole thing found no issue for indoor and outdoor unit.

Sometimes when a aircond guy come over to service your aircond , need to check all the time because a friend of mine the aircond guy didn’t clean the outdoor unit 🤯😖🙂‍↔️🔥

The aircond is cold but still not enough to cool down your room? Is your aircond suitable for your room size?

Did you try to run on Auto or Dry mode? It could be that the room is feeling "hot" due to excessive humidity. Malaysia has rising humidity weather at the moment: https://www.thestar.com.my/news/nation/2025...humidity-threat

I was told that Mitsubishi Electric are premium and good quality air conditioners. Anyone has good experience with Mitsubishi air-conds?

I'm using one in my living hall since 2007. I think Easy Clean Design one. So far only capacitor changed twice.

room size is 2.6m x 3.8m x 3m height with a 1hp Sharp J-tech inverter. I’m not sure on the calculation but looking at it should be enough?

Thanks for the suggestion, I will try to run with this mode and see how it goes. Does having those charcoal dehumidifier helps in this case?

Base on your description should be enough. Also, dry mode already can reduce humidity of the room.

whats the temp you set and whats the room temp, while the AC is running?
Inverter or non inverter?
When was the AC last serviced?

Is the pre-filter dusty when you replace it?
I have several aircons where I need to clean the fan roller after several months because of dust but the stock air con filter is not dirty.

Everyone know what happen this inverter outdoor unit ?, the compressor very noisy like non-inverter unit.


https://photos.app.goo.gl/gZzNfjdYMhhHsUNx5

I have the same unit, and this behavior is normal. The compressor will run at a high speed to reach the set temperature, and then it will reduce its speed once that temperature is met.

Other than checking physical wiring, how do I know my installer using 3 wires instead 4 wires for inverter aircond. Is there any behaviour on outdoor unit like always 100% run,not adjust the speed?