FREE AC or Heat Pump Tune-up for Maryland Delmarva Power Customers *Must have valid Delmarva Account Number. Limit one coupon per customer per visit. Valid for one-time use only. Coupon must be presented at the time of service. No cash value. Void if copied or transferred and where prohibited or restricted by law. Not valid with any other offer. Valid only at participating independently owned and operated franchise locations. Limited time offer. Other restrictions may apply. Expires: 4/20/2022