1+ day, 20+ hour ago  (74+ words) HVAC preps for summer with Hiller Plumbing, Heating Cooling & Electrical'WJHG PANAMA CITY, Fla. (WJHG/WECP) - Experts at Hiller Plumbing, Heating Cooling & Electrical are giving tips on how to make sure your HVAC is in good shape before summer. This segment…...