My 1998 Dodge Ram van has a faulty blower fan resistor, forbidding the blower fan from operating at slower speeds. I want to substitute a 25A mini blade fuse to replace the internal thermal fuse. My other option is a proposed 16-speed electronic circuit that uses a 4093, 4029, CA3140 I.C.'s, a heatsinked transistor feeding the fan, and the original fan switch and harness. The finished circuit will use the blower resistor base at one end of the PCB mounted in its case hole, with an additional hole drilled to hold the PCB inside the case near the transistor. There's a 30A blade fuse in the PDC under the hood. Am I playing with fire with this idea?