ANN ARBOR, Mich. –  Earlier this year, Norcold introduced the new Polar Series of RV refrigerators, which employs state-of-the-art technology to offer best-in-class capacity and the most modern styling available today. Now, to help introduce Polar to RVers, Norcold is offering a rebate of up to $100 on any 6-cubic-foot or larger Norcold refrigerator. “We’re…