Why is my aircon producing a foul smell?

There are two types of symptoms why your aircon is producing a foul smell.

  1. Air Con that smells like "smelly sweat" coming out the first 10 minutes but disappear after that
    • The condensation on the coil are not dripping off to the drain pan. The condensate sticks on to the coil and during the next round of operation thus causing the "smelly swear" smell

Solution: Turn on the mold proof function of your AC device, if you do not have this function, manually turn it on to FAN mode and let it run for 20 minutes to clear off any excess condensate. This helps to get rid of the smell. 

  1. Air Con that constantly producing a smelly smell (This usually happen after a long period of time)
    • There is a scent freshener in the room and during aircon operation, it get mixed in with the indoor unit and this get stuck on the coil
    • The drain pipe is choke with dirt or located near a place with pollutant or odour that is producing a foul smell, the air get sucks in and circulate into the room

Solution: You need to find the source of the problem first before performing a chemical wash as this will only temporarily remove the smell that get stuck on the coil. It will come back to you again after awhile. 

Extended warranty? What you need to know before buying it

Extended warranty in the market have 2 types, please understand fully the terms and condition before going ahead.

  1. Warranty by Supplier/Manufacturer 
    • Usually covers all parts, labour and transports for the whole system.
    • Usually no hidden condition unless otherwise stated.
  2. Warranty by Retailer/Contractors
    • Usually cover parts but not labour fee and transportation fee.
      • Labour Fee: $80-$100/day
      • Transportation Fee: $50-$60/day
    • If cover everything, usually will request you to do servicing 4 times a year directly from them.

Always ask clearly if parts, labour, transport is covered in the extended warranty. Request for detailed black and white contract from them to protect yourself.


Why is my aircon not feeling cold?

There are multiple reasons and when your air con would not feel cold. Lets look into a few scenario.

  • When you recently purchase your NEW air-conditioner but you are feeling not cold enough 
    1. It could be undersize where your capacity is insufficient to meet the cooling load of your room
    2. It could be insufficient refrigerant that cause insufficient cooling to your room
    3. If you recently change from a non-inverter aircon to an inverter aircon, you might feel the cooling difference as non-inverter aircon runs at 100%
  • When only 1 of your aircon unit has been doing a good job but suddenly dies on you (The other indoor units are working properly)
    1. The thermostat sensor is faulty and giving a wrong signal back to your aircon system
    2. The aircon unit has not been service for a long period of time, it could possibly be choke with dirt and dust.
  • When all your air-con is not feeling cold
    1. The compressor has break down - check if the compressor is running by listening to it at the outdoor unit
    2. There is a leak in your piping and cause insufficient refrigerant gas to cool down the room
    3. Outdoor unit fan motor faulty
    4. Outdoor unit PCB faulty


Which is more efficient? Turn on 1 FCU or turning on 2 FCU in 1 system.

If you have 2 sets of A Scenario running, you will consume 1.18kW at the start vs B Scenario which consume about 1.28kW. However, in A Scenario, the minimum power consumption will be 0.9kW vs B scenario which is only 0.6kW

Most of the time, the unit will run lower than rated power consumption in the evening and night-time, thus Scenario B in the long run will have better cost savings!