A fuse that keeps blowing is an indication of a malfunctioning ignition. The ignition may be the culprit or the wiring leading to the ignition may be the problem.
Motor hasseized.
2006 Ford Focus rear defroster keeps blowing the fuse immediately after replacement
Obviously, if any fuse keeps blowing there is a serious fault in that circuit.Take it somewhere they can fix it.
You need to find the cause of the short.
Compressor may be locked up.
fuse keeps blowing
The Earth's gravity keeps the gasses in the atmoshere drawn to the planet.
there is a short somewhere in dash or heater, you need to fix that to stop fuses blowing
short in the wiring behind your aftermarket radio
Sure sounds like you have a short in the wiring.
Because they have a weak supply in the engine.