With summer coming up, you might be in a position where you’re ready to replace your old air conditioning system and start fresh. We think this is a good idea, especially if your air conditioner is more than 15 years old or it is showing signs it can’t keep up with the heat the way it used to. And if you’re thinking about investing in a high-efficiency air conditioning system with features like a variable-speed fan and multi-stage compressor, we also think that’s a good idea.
But we want to caution you that simply purchasing a high-efficiency AC isn’t an automatic ticket to lower cooling bills. It might not even be a way to get sufficient cooling.
Last year we wrote a post about what to do about your air conditioning system 
This may be the spring when you choose to get a new 
Handling air conditioning repairs, maintenance, and replacements are the biggest part of our job because the weather in Katy means ACs in homes do plenty of work around the year. Your home’s air conditioning system never gets an extended vacation and probably must turn on a few times each month of winter.
It’s difficult, it not outright impossible, to get along in the heat in Katy, TX, without an air conditioning system in a home. Central ACs aren’t low-cost appliances, and immediate finances often present an obstacle when it’s time to have an old system replaced.
A residential air conditioner has a straightforward job: remove heat from a house using refrigerant and release the heat outside, cooling down the air inside the house so it can then be spread through the rooms. This process is called heat transfer, in that it shifts heat from one place to another. A good way to think of it your AC is as a pump that pumps out the heat from your house to make you feel cooler.
During a hot summer day in Katy, air conditioners in home put in long hours. You’re used to hearing the air conditioner humming away for long stretches during a 90°+ late summer afternoon. This is normal, although we recommend setting the thermostat as high as comfortably possible. This will reduce the strain on the AC and allow it to cycle down for periods.
When the Katy summer heat settles in, it doesn’t fool around! When it’s hot, it’s hot. You want to be assured that your home is always a cool retreat from the summer heat thanks to a central air conditioning system.