1990 c1500 Chevy, Another Question...

When I push the a/c start button, it blows the 25 amp fuse. Could this be a problem with the start switch that's in the a/c control head? Any thoughts? Thanks...

Unplug the wire at the compressor clutch then see if it will still blow a fuse. If is does not blow the fuse with the clutch wire disconnected the clutch has a short circuit and will need replacing. To double check, with good fuse in circuit, ignition on and a/c switch on, reconnect wire, fuse should blow.