Both cost abt $15. Just to note that the CX448 is a powerful alkaline and will burn sensitive hands. During the foaming process, fumes and heat will be given out. Be sure to do it in a ventilated area or keep away when its foaming.

let the CX448 react with the condensor for abt 15mins, the foam will slowly subside then give it a good rinse. Be sure to keep all electrical contacts away from water! ;)

i heard that using incorrect chemicals will make the fins or other metals part burn out and become thinner ? Is that true ?

of course, thats why you should always use the correct chemicals for cleaning

So the CX448 is meant for aircon cleaning ?

Really keen to try out the cleaning myself.. But saw from 1 post that there will be heat generated.. The chemical is so powerful ? It would not harm the fins etcs ?

looks good but my main unit is outside the windows....how to....

For the air-con unit inside the 3 rooms, i service myself. Dismantle the cover, filter and the main cover. Wash them up and next use a soft tooth brush and a small pail of water. Slowly brush down the fins and you can see the dirt being remove.

Take note, if 1st time do this very siong and take almost 3/4 day time. Neck and hand also very tiring but worth it. The 2nd time you do it will be a breeze. You will notice your room is colder than last time b4 cleaning.

Mee too. 1st time do very siong.

I remove the cover and filter of the unit inside the room. Then spray on the aircon cleaner. Using Mc-Klein air con cleaner. After the foaming etc. then use compressed air to blow out the dirt stucked inside the rotating fan and fins.

it will not harm the fins if used properly.

Oic. Shall drop ask my friend to drop by and buy for me as he stay nearer.

Btw any dos and don'ts of the chemical in order not to damage the air con ?

remember to rinse it after 15mins

It's really warm recently even at night....room temp. at 26deg even with aircon on...
so i figured it's time to clean my aircon.

just cleaned my unit using the spray-on cleaner...nice room temp. at 21 deg now...

thanks barra for the tip!