Every month I perform some routine maintenance on my heating and AC system. I changed the air filter and got rid of the old one. I use a disposable air filter, because it is easier than washing the air filter every month. It would be much cheaper to have a washable air filter, but I don’t want to take that time and energy to clean the air filter properly each time. I always check the evaporator coils to make sure that they are free of dust and dirt. I also check the drain line. The AC unit has to have a drain line for the access water. I found the drain line and I did not see anything coming out. I knew that was problematic. I grabbed a bowl of hot water from the kitchen sink and I put a half of a cup of bleach in the water. I slowly poured the hot water down the drain line. I hope that the hot water and bleach would get rid of anything that was clogging up the drain line. Sure enough, a moment after I started adding the water, a lot of white stuff started coming out of the drain. It looked like the stuff was sediment and sand. We definitely have a problem with hard water, so it makes a lot of sense that the sediment would be left over from the water. After I cleaned the drain line and got the water moving freely, I kept off the pipe and moved on to the next step in the process. It only took about an hour for me to perform all of the monthly services that the heating and AC unit require.