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Excessive heat appearing on A/C 25 amp fuse

Electrical and Electronic

Vehicle Information: Model: 911 Carrera; Year: 1987; Body Type: Coupe; Engine (type, size, modifications): 3.2 Ltr ; Total Mileage: 76914;

I recently bought this car. It is an extremely clean car and has had very good care. I use it very occasionally and I plan to restore to absolutely stock condition and concourse it. Recently, I had the air conditioning in my car serviced. The technician, who did the work, noticed that the 25 amp fuse that protects the circuit that supplies the condenser and evaporator motors with current became very hot when the A/C was running. He suggested that I replace the fuse block, which contains 3 25 amp fuses. The second one is the 25 amp fuse for the a/c motors. While I was looking at the assembly, I noticed that the end of the very large guage wire that is on the bottom of the fuse block had some corrosion on it. The corrosion does not appear to be extensive; it appears to be close to the end of the wire that is screwed into the fuse block. My question is; is this corrosion adding to the resistance in the circuit that would cause the fuse to become very warm to the touch? Another question; have you had reports of this type of problem before? Another question; will replacing the fuse block and cleaning the corrosion off the wire, mentioned above, solve this problem? Thank you very much for your thoughts on this.Charlie Wingo

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