Opel David air conditioner works abnormally.

Hello: Regarding your inquiry, the air conditioner starts intermittently, which may be caused by too much dust in the water tank and condenser. Clean the water tank and condenser first, and make improvements after cleaning. Secondly, check whether the water temperature is too high, whether the cooling water circulation is normal, and whether the electronic fan can be started normally. High engine water temperature will also affect the normal operation of air conditioning system. Then check the water temperature sensor, air conditioning pressure switch, fan relay and expansion valve. The failure of these components will affect the normal use of the air conditioning system. When the air-conditioning compressor starts, the load of the engine increases, so it will affect the idle speed of the engine. In general, the idle speed will change slightly, but it will not cause engine jitter. If there is jitter, you can check the carbon deposition of throttle body and idle valve first. Excessive carbon deposition will lead to obvious idling jitter. Secondly, check the working conditions of ignition coil, high voltage conductor, spark plug, gasoline pump and injector. Poor operation of these components will lead to obvious fluctuation of idle speed.