Is a hair blow dryer good for defrosting an RV fridge? July 9, 2014April 6, 2016 Chuck Woodbury In an letter to RVtravel.com, a reader explains how he uses a hair blow dryer to defrost his RV refrigerator. So is this a good idea? Certified RV technician Chris Dougherty weighs in. Hosted by RVtravel.com editor Chuck Woodbury.