COOLSERVE Air-Condition Engineering Service, dedicated people to specialised in service and repair of aircon equipment. sales, repair and installation of air conditioner system. (The DOCTOR of air condition). quality works and words of mouth we have expanded to a fleet of technicians (15 teams as of the end of 2019). The DOCTOR of Air-Con™ in Singapore. Taking care of your aircon equipment like a doctor taking care of his patients. Not only when it's sick but also when in good health.