If you have actually begun to find some leakages around the location this suggests that your a/c could be to blame. http://dai.zyuken.net/school_page/boad/post?name=oliverven&comment=%a7%a1+%a7%d6%a7%eb%a7%d6+%a7%de%a7%e0%a7%d8%a7%df%a7%e0+%a7%e1%a7%e0%a7%e3%a7%de%a7%e0%a7%e4%a7%e2%a7%d6%a7%e4%a7%ee+%a7%d9%a7%d5%a7%d6%a7%e3%a7%ee+https%3a%2f%2ftiny.cc%2Fbh99001&submit=%8f%a7%f7%8f%a2%f0%8f%a2%f0%8f%a7%c7%8f%a7%f8%a7%a2%a7%ae%a7%d5%8f%a2%f0%8f%a2%f1%8f%a2%f0%a7%dd&from=check_thread&school_id=2073401