This happens to keep the fluid in the compressor viable. If it sits too long, it can become unusable.
Is to disengage and engage
Most automotive AC compressors use a cycling clutch compressor, where the clutch is engaged by pressure switches which will engage the compressor clutch when the pressure reaches a predetermined low level, and disengages it when it reaches a predetermined high pressure.
To engage or disengage the engine from the transmission.
What specific kind of vehicle do you have? It does sound like the clutch may be bad, but we also need to know what you are working on. You need to run power straight from the battery to the compressor. If is still does not engage then you need to replace the compressor and clutch, they are dead. If they do engage, then you have a wiring or computer issue.
The A/C Compressor may not be charged with frion if the A/C Clutch does engage, or it may not engage due to fact it's not sending 12v to the electronic wiring. First start the engine and turn on the A/C, watch if the clutch on the compressor engages or not.
clutch
Low or no refrigerant Blown Fuse Defective pressure switch Bad clutch on compressor Selector switch
An air conditioner clutch will not engage without voltage. If it doesn't engage, the compressor will not turn.
The clutch will not engage ,you will not be able to shift./// the clutch will not (disengage ) making it almost impossible to shift gears
if i replace slave cylinder in 1994 Honda civic ex will this make my clutch disengage and engage correctlyanswerchange master cylinder and slave properly then bleed the system properly.
You will have to figure out why: This the 90% of the time failur: Is there Freon in the system, if there is not a minimum pressure, usually 17 PSI, the compressor will not run. Is the compressor and clutch capable of working? Is the fuse in good shape.
The a/c clutch will not engage and the compressor will not come on.............