Services: Air conditioning service, air conditioning repair ACG Service and Maintenance have been proudly supporting the air conditioning needs of Sydney home and business owners for more than 15 years. Air Con Maintenance - Keep your air conditioner operating at optimal capacity with our Air Con Preventive Maintenance service. Enjoy effective and efficient cooling/heating all year round whilst increasing the service life of your air conditioning system. Air Con Repairs - Faulty air conditioner? No need to worry, our professional and fully qualified HVAC service technicians are at your call. We’ll have you back up and running before you know it. Airconditioning Installation Protect your investment – ensure that your new air conditioning system is installed by a qualified HVAC service technician.