REV Ambulance Group Orlando (REV) is recalling certain model year 2010-2016 Road Rescue Specialty Vehicle, Ultramedic, Promedic, Duramedic, Metromedic and Transmedic emergency vehicles manufactured January 1, 2010, to May 1, 2016. These vehicles are equipped with certain Class 1 ES-Key power control modules manufactured by Hale Products. The affected power control modules may not provide sufficient circuit protection depending on their combination of software and installation, possibly resulting in a short circuit.