It may seem that it would cost less to replace only the outside unit on an older system but we don’t recommend it. Some older air conditioners used a different type of refrigerant. These units are not compatible with the new type of refrigerant. Also replacing only the outside unit will lower the overall efficiency of the system.
Today’s furnace and air conditioners are available in different efficiency levels. By investing in the highest energy efficient equipment that fits in your budget you cut your utility bills over the life of the system. Regular maintenance on your system also helps to keep it running as efficiently as possible. Also be sure to change your filters regularly and make sure your vents aren’t blocked. Programmable thermostats are yet another way to reduce your utility bills.
No. In this case bigger is not better. Air conditioners work to both cool your house and remove humidity. A unit that is too large for your home will cool down quickly but will shut off before it has a chance to remove the humidity reducing the comfort level of your home. Too much moisture in the air can also lead to mold and mildew. If your furnace is oversized, it will heat up your house very quickly but it will used more fuel and lead to greater temperature swings.
This is a question our service technicians can help you with. How old is your unit? What condition is it in? Is it out of warranty? Has it had regular preventative maintenance? If your unit is over 10 years old it is likely out of warranty. Smaller repairs make sense if the rest of the system is in good shape but if it is a more expensive repair you might want to consider replacement.
Most systems have a lifetime of 15 to 20 years. Regular maintenance and clean filters will help your system last longer. As units get older the efficiency can begin to drop drastically. They also tend to get noisier and need more repairs as they age. Technology has improved over time, and today’s newer units are more energy efficient. These newer more efficient units make sense, especially if your system is over 10 years old.