How it Works

Air conditioning works by passing the air in your home over a cold coil that in-turn cools the indoor air.  This chilled coil is located at your furnace which is attached to duct work that distributes air throughout your home.

Note: This is not a detailed explanation of refrigeration. It is only intended to explain the general workings of a central air conditioning system.

Click here to enlarge the diagram

Why it doesn’t work

Some homeowners find out in the middle of the day; some the middle of the night. Others find out when they arrive home from work or errands. THE AC ISN’T WORKING! Nothing is more frustrating than when the one place we expect to be comfortable, our home, is a place of misery. Panic sets in as we wait for a solution. When this happens homeowners can check our troubleshooting page to see if there’s an easy solution. Sometimes homeowners assume their thermostat isn’t working but the problem usually lies somewhere else. Most complications that occur require a professional. Some common symptoms home owners may experience are:

  • The fan seems to be running but it’s only circulating warm air
  • The AC outside and furnace fan are both not working
  • The air conditioner seems to be working but intermittently or not very well

These problems can be caused by a number of component failures. The most common air conditioner failures are caused by:

  • A bad capacitor
  • A worn contactor
  • Freon or refrigerant leak
  • Compressor failure
  • Dirty filter
  • Bad thermostat

What causes air conditioner bills to be high in the summer?

Air conditioning bills can be high for several reasons. The most common causes of high electric bills in the summer are one, or a combination, of the problems below:

  • Old, inefficient air conditioning system
  • Dirty, unmaintained HVAC equipment
  • Setting the thermostat too low
  • Poor insulation or a leaky home

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