Job Title. HVAC/R Service Technician. Company. HASCO Heating Airconditioning Service Co. Inc. Location. Riverside, California. Are you a skilled HVAC/R Service Technician looking for a new opportunity. Join HASCO Heating Airconditioning Service Co. Inc., a trusted name in HVAC services with a rich history of over 41 years serving the Inland Empire. We take pride in providing top-notch heating, air conditioning, and refrigeration solutions to our ...