New Aircon Not Cooling
New Aircon Not Cooling . Reasons why your new air conditioner is not cooling dirt accumulated in the air filter. The major reason your aircon is not cold anymore might be dirt in the appliance that makes them clog the air filters. Central Air Conditioning vs. Ductless MiniSplits When Window Units from stackheating.com Dirty or clogged air filter. Reasons why your new air conditioner is not cooling dirt accumulated in the air filter. First, you’ll want to check that the air conditioner mode is set to the correct setting.