Possibly a low refrigerant charge
More than likely it's the internal overload on the compressor kicking it out.
When you select the defrost setting , the air conditioning compressor will kick in and out to help dehumidify the air , that's normal to hear the compressor kicking in and out
There could be a wide variety of reasons. You might have blockage in the system, you might have too little or too much refrigerant in the system, you might have too much or too little compressor oil in the system, the dessicant in your accumulator or receiver-drier could be saturated... what you need to do is have a system performance test done on your AC system.
check the fuse, then the relay and wiring. If the pulley clutch is getting power, then you may need a new clutch or compressor.
yes
AC compressors will cycle like that when there is insufficient refrigerant.
If the compressor is not kicking in, check the fuse, check the compressor clutch air gap, check the low pressure cut out switch, check the high pressure cut out switch.
Probably low or empty of freon.
More than likely it is low on refrigerant and the compressor is kicking off on the low pressure switch. After it is off for a few seconds the low pressure switch resets and starts up again, runs a few seconds and off again. Continuous cycle of off and on.
In the fuse panel, visible on end of dash when driver's door is open, in location # 18 is a 15 amp fuse for the A/C system.
the air conditioner kicking on and off will do it too/;p
Mabe your compressor is not kicking on for some reason. Check to see if the front of your compressor starts spinning when you turn it on. If it don't check to see if there is power to the wires that go to your compressor. If there is power you have a bad compressor. If there is not check the fuses or relays.