Modern split AC units are designed to withstand winter conditions without a cover. In fact, a cover can retain moisture that may cause premature system corrosion.
Two-stage operation means that the heat pump or air conditioner can operate at a fraction or its maximum capacity on milder days, and full capacity only when needed. This results in longer system cycle times, lower sound levels, more consistent indoor temperatures, and enhanced dehumidification.
This refers to the type of compressor in your air conditioner or heat pump. When combined with a variable speed indoor air handler or furnace, it creates the cooling capacity for your system. Variable speed compressors allow a unit to run at virtually any speed between 30% and 100% based on the needs of the conditioned space at any point in time. This ensures maximum efficiency, comfort, and dehumidification rates.
A heat pump is like a central air conditioner, but includes a reversing valve that allows the system to provide winter heating in a single efficient package. There are several heat type types:
System zoning allows different parts of a conditioned space to be controlled independently with their own thermostat and operating conditions. The primary benefits of system zoning are improved comfort and energy savings. There a four common ways to provide system zoning in a conditioned space:
Many air conditioners can last 15 to 20 years, if maintained properly.
Central air conditioning efficiency is measure by the SEER (Seasonal Energy Efficiency Ratio) rating. The SEER rating is derived by dividing the annual estimate cooling output (in btus) by the electric energy input. The higher the ratio, the more efficient the AC system. The United States Department of Energy (DOE) requires all new air conditioning units to meet minimum efficiency ratings identified by these SEER numbers.
In general you should replace both the outdoor and indoor sections of your AC system during a replacement.
All air conditioning manufacturers recommend that your AC is serviced every year by a trained HVAC professional. If used as part of a complete heating and cooling system, it should be serviced in both the spring and the fall. Annual maintenance, including a thorough examination and cleaning of the parts that commonly malfunction, like the air filter, the outdoor fan, the indoor blower, the refrigerant lines, and any condensation removal systems will ensure safe operation, prolong equipment life, and sharply reduce the possibility of unanticipated failures.
There are things you can check if your AC system does not turn on properly:
Check System Power:
Indoor Airflow Issues:
This is often caused by a lack of airflow across the indoor coil during cooling operation. Check and change your indoor air filter. Check to make sure that almost all of your indoor grills are registers are open and clear. If it turns out that the filter or closed registers was the problem, turn the system on to "Fan Only" for a few minutes to speed up the thawing of your indoor coil before restarting your AC system.