The answer is “Yes.” Here are some simple procedures you can perform before opting for the expense of a service call: Check disconnect switches (indoor and outdoor if you have a split system). Make sure that circuit breakers are ON and that fuses have not blown. Check for sufficient airflow. Make sure air filters are clean and that supply-air and return-air grilles are open and unobstructed. Check the settings on your thermostat. If you want cooling, make sure the temperature control selector is set below room temperature and the SYSTEM switch is on the COOL or AUTO position. If you want heat, make sure the temperature control selector is set above room temperature and the SYSTEM switch is at HEAT or AUTO. The FAN switch should be set at AUTO.

No, turning the temperature down further will not make it cool any better and may only compound the problem. If your air conditioner does not seem to be cooling, there may be a problem with its operation and a professional should be called to check the system.

Three main factors to consider are: Life expectancy of current system. Operating cost. Looking at the big picture. When you’re frustrated by an equipment breakdown, it can be tempting to find the least expensive “quick fix” to get on with your life in relative comfort. That “quick fix” may be the least expensive option now, but it may not give you the most value–or cost you the least–in the long run. Paying for repairs on an old or inefficient system often simply prolongs the inevitable. It’s almost like putting a bandage on a serious injury. An older system that breaks down once is likely to break down again… and again. That means more emergency service calls or, worse yet, the risk of damage to your home or to other components of your heating and cooling system. Operating Cost There’s also an ongoing cost factor to consider. Restoring your old system will only bring it back to its current level of energy efficiency. After you’ve recovered from the repair bills and the frustration of system breakdowns, you still won’t save on your energy bills. Even six-year -old heat pumps and air conditioners are considered grossly inefficient by today’s energy efficiency standards, as are most furnaces built before 1980. With new high-efficiency equipment, you could save up to 60% on your energy bills. That’s why installing a new heating and cooling system can actually pay for itself in energy savings within a relatively short time. Looking at the Big Picture When one component of your system breaks down unexpectedly, it’s easy to just focus on repairing or replacing that component. However, each part of your system works with the others to boost efficiency and reliability, so it helps to keep the big picture in mind. Replacing your old furnace with a new higher-efficiency model but leaving your old mechanical thermostat in place, for example, won’t allow you to enjoy all the efficiency advantages the furnace has to offer. Likewise, if you install a new furnace but don’t get a humidifier, the air may seem cooler, forcing you to operate your new system at a higher temperature to be comfortable. Plus, you can often save on installation costs if you have several components of your system (for example, a furnace and air conditioner) replaced at the same time.

It is best to set the temperature to a setting that is comfortable for your individual preferences. Typically, most people are comfortable between 76°-78° for cooling and 68°-70° for heating.