Air conditioning is not the cause of a heating, air conditioning and heating with extra single capillary or valve problems; 2, air-conditioned four-way valve light string; 3, air-conditioning filters need cleaning; 4, air-conditioning compressor age cause a decline in efficiency; 5, lower the outdoor temperature or humidity, air conditioning itself cause a decline in efficiency; 6, auxiliary heating does not start and so affect the air conditioning and heating; 7, lack of fluoride air conditioning cooling heat transfer in the summer, the indoor unit because of low evaporator surface temperature, air conditioning moisture When water freezes in the evaporator surface air conditioning inside the machine, brought together more after the formation of water. Condensate produced as a conduit to drain away. Similarly, in the air conditioning and heating, the air conditioning inside the machine during heating, the outdoor unit in the refrigeration, the outdoor temperature is low the central air conditioning unit, which also absorb moisture in the outdoor air. But generally when heating low outdoor temperatures are relatively teach, condenser surface temperature is below 0 degrees central air conditioning Which is good, moisture in the air condenses into the condenser surface will freeze or frost after. With the passage of time and the central air-conditioning company, the more the knot. Thus, the air conditioning heating effect is getting worse. When Icy to a certain degree, air conditioning will start defrosting program of the West, to provide air conditioning and heating effects. Ice melts, it becomes water, which is commonly known as the air conditioner outdoor machine "leaks." Air conditioning and heating when the outdoor unit leakage is normal? This sentence should be changed, air-conditioning and hot water when the outdoor unit is normal central air conditioning production, but should not leak to the outside. Because now like family with a small air-conditioning, such as the bottom of the wall unit, Guiji and other outdoor unit has a drain hole, it can lead to a drain can drain a place, but when the installation does not install it. Also note that some units currently defrosting of random, but also some automation, as well as the shutdown of, regardless of the kind, do please do not shut down until the defrost is completed automatically resumes heating. Central air conditioning prices | deckle central air conditioning | Xi'an Hao Hao Electrical and Mechanical Services provided by Xi'an Electrical and Mechanical Technology Limited. Xi'an Hao Electrical and Mechanical Technology Co., Ltd. (www.029hfkt.com/)(www.029hfkt.com) strong, credible, in Xi'an in central air-conditioning industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the Electrical and Mechanical Xi'an Hao into the brilliant and you work for a better future!