As a homeowner there are a few things that you can do if your air-conditioner starts to act up and make strange noises. On the other hand, your air-conditioner may sound perfectly fine but there is no cold air coming out from the unit. Here are a few things that you can do before calling a air-conditioning professional into your home. You need to remember though that an air-conditioner basically has a 12 year lifespan and that eventually you will have to buy a brand-new unit.
Always check the obvious things first. For example, if your air-conditioner is not producing cold air make sure that the thermostat is set properly and that the unit is plugged in. If your air-conditioner is situated outside check to see that there is not any debris blocking the intake valves or that your filter has not become clogged. A brand-new filter can cost between $5-$20 and is a lot more economical than one hour of time from a professional air-conditioner serviceman.
Sometimes it may be as simple as a little bit of lubrication here or a little bit of tightening there. There is a lot of great information online that can help you but unfortunately there will come a time when your air-conditioner will need to be replaced.