Supco FPRO100 Furnace Pro Switch Clip HVAC Door Interlock Magnetic Service Tool
FPRO100 Furnace Pro Switch Clip. 🔧 WHY CHOOSE THE SUPCO FPRO100?. The Professional’s Choice — Used daily by HVAC technicians, maintenance engineers, and experienced DIYers. Eliminates guesswork: if the furnace runs with the FPRO100 installed, the door switch is your problem.