Air conditioning heating how to self-test

In fact, because of the cold winter weather causes air conditioning compressor operation required a process, so he needed time to start in front of the heating, air conditioning you need to turn the compressor, after fully booted, air will begin to heat. Next, give us some air conditioning in the winter when heating is not strong enough you need to check several points, this friend may wish to look at.
(1) temperature setting is appropriate.
(2), whether the filter mesh is blocked.
(3) whether the Windows and doors wide open.
(4) Sun ever reaches the Interior (refrigeration).
(5) room whether there are too many sources of heat, such as electric heaters (heating).
(6) wind speed is in a weak position.
(7), whether there is a blockage of inlets of the indoor and outdoor units.