“ although of spring traffic maintain basically safeguard with cleanness give priority to, but air temperature change is very sharp, must undertake in time maintenance to air conditioning system. ” final controller still emphasizes, tube of examination air conditioning whether agent of burst, refrigeration whether leak while the radiator that cleans air conditioning even and medicinal powder sirocco fan. If car place is used, still is winter uses lubricating oil, should change its use lubricating oil for the summer.