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Without the year, make or model it could be any of the following..
1. Relay.
2. Sensors.
3. Clutch hub worn out.
4. A/C - heater controller.
5. PCM or ECM bad.
It would be best to scan the vehicles computer so that you can find out just what is wrong......
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∙ 14y ago
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Why isn't your ac compressor coming on when you turn on the ac?
most likely it is out of freon
How do you unfreeze ac line?
Turn the compressor off.
Why does the ac compressor on a 1999 escort turn on in fan mode?
A lot of vehicles will activate the A/C compressor in 'Defrost' mode. Either Bi-Level or defroster will turn on the A/C compressor. I know in a lot of GM vehicles, even just the floor selection will turn it on.
What powers the AC relay to turn on AC compressor?
For residential equipment it is 24 volts
What would cause the AC compressor and blower fan to not turn on even with good fuses on a 1997 Isuzu Rodeo?
You may need to replace the heater\ac control switch, it may be stuck in the off position which would prevent the blower and the ac compressor from turning on.
What would cause the AC compressor of a 2005 Toyota Tacoma not to turn on besides a fuse?
Check the Freon pressure first. The AC compressor will not turn on if the Freon pressure is too low.
How do you fix an air condiosoner pump because it does not spin or work?
Do you mean that the AC clutch does not engage the compressor? Or do you mean that the AC compressor won't turn even if the clutch is engaged? If the compressor is siezed and will not turn even if the clutch is engaged, the only choice is to replace the compressor. If you can turn the compressor by hand (understand that the belt pulley will turn freely with the engine if the clutch isn't engaged) but the compressor clutch isn't engaging, it might just be out of refrigerant. There is a sensor, usually somewhere near the receiver/dryer) that detects the "low side" refrigerant pressure. Once the refrigerant pressure at the sensor drops below a specified level, the compressor will not turn on. In other words, if the compressor clutch won't engage it might just be out of refrigerant.
What is the compressor on a 2001 Dodge Ram?
The ac compressorThe ac compressor
When the ac is turn on noise comes out what the reason could be?
the ac belt or the compressor bearings are going bad
Why is F150 ac making a clicking noise when turn ac on?
the clutch on your A/C compressor needs to be replaced.
Does the pulley on the ac compressor turn freely?
IT should turn freely when the a/c is not turned on.
I just bought a 95 Taurus and it keeps snapping the belt it needs a new ac compressor but we don't turn on the ac unit can we bypass the ac without removing it?
If your car has a Serpentine belt that's one piece and made specifically for that engine, chances are you may have to repair the AC unit. From the description "snapping belts" one would assume that the AC Compressor is siezed, where the pulley doesn't even turn freely.
