When you head into the house after a long, humid day, there’s nothing you want more than to have a nice, cool space to relax in. But when you turn on your air conditioner, you start to sweat instead—and it doesn’t seem to be doing you any good. It’s clear your AC isn’t cooling the house, but why? Is your unit broken? Is the air conditioner on the fritz?
Here are some reasons why AC running but not cooling
- The thermostat is set incorrectly
If your AC is running but not cooling, it may be set to the wrong temperature. Your thermostat may be set below the air temperature in your house, or the temperature you set the thermostat to may be hotter than the air temperature.
- The air filter is dirty
If you’ve been wondering why your air conditioner is running but not cooling, chances are you may have a dirty air filter. If you don’t change your air filter regularly, dust and debris will build up in your system, which can clog vents and limit airflow. This can cause the evaporator coil, which is where the air conditioner draws in cool air, to overheat. When this happens, you may notice that your system is running but isn’t cooling your home.
- The condenser unit is blocked
When your air conditioner is not working properly, it can be frustrating. This is especially true if your unit is about to go out for the season and you want to get a few more weeks of relief from the summer heat. However, as a rule, your air conditioner should never make a clicking sound when it is trying to start up. A clicking sound might mean that your condenser unit is blocked.
- The heat pump is damaged
We’ve all been there, but unfortunately, it always seems to happen at the worst possible time—when we are least prepared. A heat pump breaks down out of warranty, and the repair bill is more than the unit is worth. You’re out of luck, right? Not necessarily. There are three things you can do to prepare for a worst-case scenario like this one, to keep you and your wallet from going through the summer swelter.
- The evaporator coil is frozen
The evaporator coil is the device in the central air conditioner that feeds cool air into the house. If the evaporator coil freezes, the central air conditioner can’t function, and the house will feel warm and uncomfortable. This situation can be dangerous and expensive to repair. Fortunately, there are some tell-tale signs that the evaporator coil has iced up, which you can watch out for.
Fans are running, but the air is still hot? If your air conditioner is blowing air, but it’s not cooling, then there’s a problem. Start by shutting the unit off, and check the drain pan under the unit. If water is present, there may be a problem with the outside unit or the drain line. You should call a specialist as soon as possible for help.
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