Poor equipment operation, inadequate equipment or leaky ductwork can cause air to be too dry in winter and too humid in summer. Excessive humidity levels are cause for concern and should be shared with your HVAC technician.
Leaky ducts can pull particles and air from attics, crawl spaces and basements and distribute them throughout your house. Sealing your ducts rather than replacing your air conditioning system may be a solution.
An air conditioning system that turns on and off frequently, quickly cooling your home but not maintaining the temperature, may be too big for your home. Conversely, one that runs constantly may be too small. The results of an improperly sized system include high energy bills and humidity.
The Seasonal Energy Efficiency Ratio (SEER) measures the cooling efficiency of a heat pump or air conditioning system. Generally speaking, the higher the SEER, the more efficient the air conditioning system. Today's new air conditioning systems are more than 50 percent more efficient than systems manufactured 10 years ago. So, if you are concerned about utility bills and are faced with an expensive repair, you may want to look at the energy savings a new system offers.
You should change the air filters on your HVAC system every 30 days, no matter what the packaging says. If you're going 3 or 4 months without changing an air filter, the air filter is getting clogged and making your HVAC system work harder. A clogged air filter harms the air quality in your home and greatly increases your chances of an HVAC system experiencing premature failure.