It’s May, and chances are that you’re already getting some use from your air conditioning system in Wilmette, IL. It may be only a few days during the week for short stretches—we aren’t fully done with the cool weather yet—but it will be enough for you to tell if something major is wrong with the air conditioner. For example, you’ll know when the air coming from room vents isn’t cool when the AC is running.
Obviously, a cooling system that doesn’t actually cool is not much use to you. It’s just acting like a big fan, and that doesn’t help when temperatures climb. There are a number of possibilities for why an air conditioner will lose its cooling power. Some are simple errors that you can correct yourself. Others are more complicated and will require HVAC technicians to diagnose and correct them. And some are serious trouble that place your AC in danger of a major failure, possibly even an early replacement, unless professionally fixed as soon as possible.
It’s now officially spring, and no matter what cold spells we may encounter in the coming weeks, the move toward warmer weather has started. This is an excellent time of the year to consider options for 
There are many proverbs about the strange weather that occurs in March. You may have heard that March “comes in like a lion and leaves like a lamb.” Or perhaps you’ve heard it “comes in like a lamb and leaves like a lion.” That’s the nature of the weather during this month that straddles winter and spring: it’s difficult to predict exactly which way the temperature will go—