This is because the drian pan of air conditioner is very dirty so there are a lot of bacteria mutiplying as the algae formed clogging the drain pile . Bleach doesnot work well because it will react immediately & become useless very fast . You need a bactericide which is in solid gel form slowly release the chemicals to kill the bacteria . Before you use this chemical you need to clean away the algae from the drian pan & pile ,then you can put one called Anti-clog in the drain pan & it will last for couple months . You may buy it from this company(26055033) .
2010-05-28 22:40:34 補充:
If your air con is wall-mounted & there is no drain pan then bacteria is from the air . The one I recomend , is good for air con with drain pan . Since yours has only the pile , I think you should first clean away all the algae from your pile , then periodically you spray
2010-05-28 22:42:44 補充:
some disinfectant onto the coil . Along the coil it will drain through the pile so that it will inhibit the growth of the algae . Hope this can help you .