I noticed that our cooling system wasn’t functioning properly after heavy rainfall the previous weekend. I checked the thermostat, which seemed to be working just fine. The sensor in the thermostat was adjusted perfectly as well. I also checked the air filters in our cooling system. Unfortunately, the air filters were not the cause of our cooling system problems either. I had just replaced the air filter a couple of weeks ago. I then went through the many other steps to check on the status of our cooling system. I could not find the problem until I called a professional HVAC specialist to come take a look at it. She told me that due to the heavy rainfall last week, the humidity in the air was off the charts. Excess humidity can cause your cooling system condensate drain to clog and not drain properly. When the cooling system doesn’t drain properly, it doesn’t function properly. The clog had to be removed by the HVAC specialist. Another issue that could have caused drainage trouble is the mounting level. If a window cooling system is not mounted on a level surface, such as if it were to be on a decline, it could disrupt the drainage of the unit. Luckily, I just had to deal with the humidity issue. Once the HVAC specialist removed the clog, our cooling system was back up and running again. I just have to keep an eye on the humidity levels and keep our HVAC specialist number handy in case our cooling system drainage gets congested once more.