Refer A Friend and Make Some Money in the Process Free money! Well, kinda. If you refer any of your friends or family and they purchase a heating or cooling product or utilize our services you can be rewarded for it. After your service, just ask your technician for a copy of our referral program flyer and fill in the ExpertCash coupon portion on it. Then, deliver them to your friends and family and make sure to tell them that they will receive a special discount for using the coupon. You earn cash and they get a discount… it’s that easy! You Get They Get $25 Visa Gift Card $25 Off A Tune-up/Repair $50 Visa Gift Card $50 Off A System Tune-up $100 Visa Gift Card $100 Off A Heating OR Cooling Unit $250 Visa Gift Card $250 Off A Heating AND Cooling System