As you probably know, air conditioning units work by circulating refrigerant fluid. Topping up this refrigerant is one of the main tasks of an air conditioning service, since systems typically lose up to 8% of it every year. It is not a job that can be carried out at home. Nor is it something that you should trust to an inexpert servicing provider.
Having topped up the refrigerant, it is necessary to make sure that all is well with the system. If you are not running the aircon regularly (for example in cooler weather), the seals in the system can be deprived of lubrication and become prone to leakage. Using professional equipment and expert knowledge, the workshop staff at Bosch Car Service will check for leaks and ensure that the system is able to maintain refrigerant pressure. If any problems are detected, they are well qualified to carry out car air conditioning repairs (with your approval).
Something you may not know is that car air conditioning systems contain a component called a dryer. It removes moisture from the refrigerant, which would otherwise cause wear and tear. This item has a limited life span and needs to be replaced regularly to avoid damaging the whole system. Your Bosch Car Service engineer will find out whether the dryer needs replacing and do so if necessary. Once again, this is something that only a reputable air conditioning repair service should undertake.