older air conditioner in the wash. after not maintaining it for a long time. dusty interior and the parts are rusty. accumulating

accumulating after air allergic and are blower clean cleaning coil cold condition conditioner conditioning cool cooler dirty dust dusty electric equipment fan filter for heat home house hvac indoor industry infections interior long maintaining maintenance not older parts problems professional remove repair replace respiratory rusty service system systems technology temperature time unhealthy unit wall wash water white work